BILA:0000000 anatomical entity BILA:0000003 anatomical structure Material anatomical entity that has inherent 3D shape and is generated by coordinated expression of the organism's own genome. BILA:0000004 portion of organism substance Material anatomical entity in a gaseous, liquid, semisolid or solid state; produced by anatomical structures or derived from inhaled and ingested substances that have been modified by anatomical structures as they pass through the body. BILA:0000005 anatomical space Non-material anatomical entity of three dimensions, that is generated by morphogenetic or other physiologic processes; is surrounded by one or more anatomical structures; contains one or more organism substances or anatomical structures. BILA:0000006 material anatomical entity Anatomical entity that has mass. BILA:0000007 immaterial anatomical entity Anatomical entity that has no mass. BILA:0000008 anatomical line Non-material anatomical entity of one dimension, which forms a boundary of an anatomical surface or is a modulation of an anatomical surface. BILA:0000009 anatomical point Non-material anatomical entity of zero dimension, which forms a boundary of an anatomical line or surface. BILA:0000010 anatomical surface Non-material anatomical entity of two dimensions, that is demarcated by anatomical lines or points on the external or internal surfaces of anatomical structures. BILA:0000011 anatomical system Anatomical group that is has as its parts distinct anatomical structures interconnected by anatomical structures at a lower level of granularity. BILA:0000012 multi-cellular organism Anatomical structure that is an individual member of a species and consists of more than one cell. BILA:0000013 cell Anatomical structure that has as its parts a maximally connected cell compartment surrounded by a plasma membrane. BILA:0000014 cell component Anatomical structure that is a direct part of the cell. BILA:0000015 excretory system The excretory system is the system of an organism that mainly performs the function of excretion, the bodily process of discharging wastes. It is responsible for the elimination of wastes produced by the processes that maintain homeostasis. renal system BILA:0000016 cardiovascular system BILA:0000017 eye The minimum setting for an eye involves a photo-receptor in the vicinity of shading pigment, which allows the detection of the direction of light. A simple eye consists of one photoreceptor and one pigment cell. Such prototype two- celled eyes are found, for example, in trochophora larvae and in planarians. Our definition also includes single photosensitive cells containing both photo- and shading pigment (eg. unicellular algae, turbellarian 'epidermal eyes'), but excludes photoreceptor cells not combined with shading pigment (eg. deep brain photoreceptor cells). BILA:0000018 appendage An appendage is an external body part, or natural prolongation, that protrudes from an organism's body, such as a vertebrate's limbs. BILA:0000019 compound organ component Multi-tissue structure that is part of a compound organ. BILA:0000020 heart BILA:0000021 simple organ Multi-tissue structure that is not part of a compound organ. BILA:0000024 compound organ Anatomical structure that has as its parts two or more multi-tissue structures of at least two different types and which through specific morphogenetic processes forms a single distinct structural unit demarcated by bona fide boundaries from other distinct anatomical structures of different types. BILA:0000027 male organism Gonochoristic organism that can produce male gametes. BILA:0000028 female organism Gonochoristic organism that can produce female gametes. BILA:0000029 hermaphroditic organism Multi-cellular organism that can produce both male and female gametes. dioecious organism BILA:0000030 asexual organism Multi-cellular organism that does not produce gametes. BILA:0000032 organism subdivision Anatomical structure which is a primary subdivision of whole organism. The mereological sum of these is the whole organism. BILA:0000034 embryonic structure BILA:0000035 germ layer BILA:0000036 ectoderm BILA:0000037 mesoderm BILA:0000038 endoderm BILA:0000039 neuroectoderm BILA:0000040 acellular anatomical structure Anatomical structure that consists of cell parts and cell substances and together does not constitute a cell or a tissue. BILA:0000041 anatomical cluster Anatomical group that has its parts adjacent to one another. BILA:0000042 extraembryonic structure Anatomical structure that is contiguous with the embryo and is comprised of portions of tissue or cells that will not contribute to the embryo. BILA:0000043 portion of tissue Anatomical structure, that consists of similar cells and intercellular matrix, aggregated according to genetically determined spatial relationships. BILA:0000044 visceral mesoderm BILA:0000045 sequential hermaphroditic organism Hermaphroditic organism that produces gametes first of one sex, and then later of the other sex. consecutive hermaphroditic organism BILA:0000046 synchronous hermaphroditic organism Hermaphroditic organism that produces both male and female gametes at the same time. serially hermaphroditic organism BILA:0000047 somatic mesoderm BILA:0000048 gonochoristic organism Multi-cellular organism that has male and female sexes. monoecious organism BILA:0000049 protandrous hermaphroditic organism Sequential hermaphroditic organism that producesngametes first of the male sex, and then later of thenfemale sex. BILA:0000050 protogynous hermaphroditic organism Sequential hermaphroditic organism that producesngametes first of the female sex, and then later of thenmale sex. BILA:0000051 cardiac mesoderm BILA:0000052 blastomere BILA:0000053 organizer Spemann's organizer BILA:0000054 anatomical group Anatomical structure consisting of at least two non-overlapping organs, multi-tissue aggregates or portion of tissues or cells of different types that does not constitute an organism, organ, multi-tissue aggregate, or portion of tissue. BILA:0000055 multi-tissue structure Anatomical structure that has as its parts two or more portions of tissue of at least two different types and which through specific morphogenetic processes forms a single distinct structural unit demarcated by bona-fide boundaries from other distinct structural units of different types. BILA:0000056 embryonic organism developing organism BILA:0000057 zygote embryo BILA:0000058 cleaving embryo BILA:0000059 blastula embryo BILA:0000060 gastrula embryo BILA:0000061 neurula embryo BILA:0000062 cell space Anatomical space that is part of a cell. BILA:0000063 portion of cell substance Portion of organism substance located within a cell. BILA:0000064 single cell organism Cell that is an individual member of a species. BILA:0000065 basal lamina Acellular anatomical structure that consists of a thin sheet of fibrous proteins that underlie and support the cells of an epithelium. It separates the cells of an epithelium from any underlying tissue. BILA:0000066 epithelium Portion of tissue, that consists of one or more layers of epithelial cells connected to each other by cell junctions and which is underlain by a basal lamina. BILA:0000067 simple cuboidal epithelium Unilaminar epithelium that consists of a single layer of cuboidal cells. BILA:0000068 simple columnar epithlium Unilaminar epithelium that consists of a single layer of columnar cells. BILA:0000069 multilaminar epithelium Epithelium that consists of more than one layer of epithelial cells. BILA:0000070 simple squamous epithelium Unilaminar epithelium that consists of a single layer of squamous cells. BILA:0000071 atypical epithelium Epithelium that consists of epithelial cells not arranged in one ore more layers. BILA:0000072 cavitated compound organ Compound organ that contains one or more macroscopic anatomical spaces. BILA:0000073 unilaminar epithelium Epithelium that consists of a single layer of epithelial cells. BILA:0000074 solid compound organ Compound organ that does not contain macroscopic anatomical spaces. BILA:0000075 segmenting embryo BILA:0000076 juvenile organism BILA:0000077 epithelial cell Cell which has as its part a cytoskeleton that allows for tight cell to cell contact and which has apical-basal cell polarity. BILA:0000078 adult organism BILA:0000079 nervous system BILA:0000080 central nervous system In physiological terms, a CNS integrates and processes sensory information coming from the periphery, and initiates body-wide responses via neurosecretion into the body fluid or direct stimulation of the body musculature. Anatomically, a CNS is a delimited nervous tissue that comprises distinct agglomerations of functionally specialized neurons (nuclei) interconnected by axon tracts (neuropil). The CNS may be subdivided into separate parts (ganglia). It connects to the periphery via nerves. A CNS thus defined is found in various shapes and degrees of complexity in different animal phyla, including vertebrates and many invertebrates, such as echinoderms, arthropods, nematodes, molluscs and annelids. CNS BILA:0000081 peripheral nervous system PNS BILA:0000082 digestive system alimentary system BILA:0000083 digestive tract ; alimentary canal; gastrointestinal tract BILA:0000084 primitive gut BILA:0000085 foregut BILA:0000086 midgut BILA:0000087 hindgut BILA:0000088 musculature system BILA:0000099 sensory system BILA:0000103 reproductive system BILA:0000104 immune system BILA:0000115 head The head of an animal is the anterior part that usually comprises the brain, eyes, ears, nose, and mouth. BILA:0000116 trunk BILA:0000117 tail BILA:0000118 surface skin BILA:0000122 urogenital system BILA:0000123 gonad BILA:0000124 testis BILA:0000125 ovary BILA:0000126 protonephridium BILA:0000127 metanephridium BILA:0000128 nephros BILA:0000132 visceral muculature BILA:0000133 somatic musculature BILA:0000134 cardiac musculature BILA:0000135 brain BILA:0000136 nerve cord BILA:0000139 chemosensory system BILA:0000140 photosensory system BILA:0000142 mechanosensory system BILA:0000143 gustatory system BILA:0000144 olfactory system BILS:0000105 bilateria developmental stage BILS:0000106 zygote stage one cell stage BILS:0000107 cleavage stage BILS:0000108 blastula stage BILS:0000109 gastrula stage BILS:0000110 neurula stage BILS:0000111 organogenesis stage segmentation stage BILS:0000112 juvenile stage BILS:0000113 adult stage