| Term | Definition |
|---|
| body symmetry | refers to the shape and arrangement of the body |
| asymmetrical | animals that lack a definite body shape |
| radial symmetry | the body is arranged around a central point |
| bilateral symmetry | these organisms are more complex they have definite left and right side a ventral and dorsal side and an anterior and posterior side |
| repsiratory | provides osygen to cells and removes carbon dioxide |
| circulatory | carries oxygen fna food to the cells and carries carbon dixoide and waste away |
| nervous | organizes body responses to stimuli |
| digestive | breaks down food into smaller molecules to be used by cells for energy |
| excretory | removes waster from the body |
| muscular | works with the skeletal system to produce movement |
| skeletal | support the body and protects internal organs |
| reproductive | produces reproductive cells, nurtures and protects the developing embryo |
| endocrine | controls growth, development, metabolism and reproduction |
| immune | protects the body from diseases |
| integumentary | acts a barrier against infection and injury |
| comparative anatomy | a field of science in which the structures of living things are compared to understand the development of and relationship between species |
| closed circulatory system | a system in which blood is contained within a network of blood vessels |
| open circulatory system | a system in which blood is not contained within a network of blood vessels |
| incompleted metamorphosis | a development system which consist of three stages: egg, nymph and adult |
| complete metamorphosis | a development system which consists of four stages: egg, larva. pupa, and adult |
| alternation of generation | a cycle of alternating between the production of gaemtophytes and sporophytes |
| gametophyte | has half the number of chromosomes (haploid) as found in a sporophyte |
| sporophyte | has a full number of chormosomes (diploid) |
| gymnosperm | is a seed plant that does not encase its seeds in fruit |
| pollination | occurs when pollen from a male cone falls into a female cone |
| fertilization | the process in which a sperm and an egg joing together |
| angiosperm | a seed that produces seeds enclosed in a fruit |
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