Animal Biology BIOL152 Flashcards
(238 cards)
what are the common characteristics for animals
multicellular, heterotrophs, no cell walls, nervous tissue, movement, sexual reproduction, extracellular matrix, cell junctions, Hox gene clusters, similar RNA.
how many animal phylae are there
36
how much of the 36 animal phylae are vertebrates
99%
how species of vertebrates are there
42,000
what is the size range of vertebrates
microscopic to whales
what are the morphological and developmental features of animals
presence or absence of different tissue types, body symmetry types, embryonic development features, body cavities and segmentation, exoskeleton or notochord.
what are metazoas
multicellular, eukaryotic organisms in the biological kingdom Animalia (all animals)
how are metazoas based
specialized tissues
what are parazoas
a group of invertebrate animals coextensive with Porifera and comprising multicellular forms; SPONGES
what do parazoa not have
specialized tissues and organs
what are eumetazoas
a major division of the animal kingdom comprising all multicellular forms except the sponges; more than 1 types of tissue and organs.
what is the symmetry of eumetazoans
radically or bilaterally
what are bilateria
bilaterally symmetrical animals
what does it mean to be bilateral
have cephalization, ventral and dorsal sides, and 3 germ sides.
What does it mean to be radial
oral and aboral sides, 2 germ sides.
what are radial animals called
radiata
what is the transverse plane
at the half, leaving the top and the bottom halves
what is the midsagittal plane
down the middle, leaving left and right sides
what is the frontal plane
in half through the side, splitting it into posterior and anterior sides
when do cell layers develop
during gastrulation
what is the endoderm
the innermost layer of cells or tissue of an embryo in early development
what is the ectoderm
the outermost layer of cells or tissue of an embryo in early development
what parts are derived from the ectoderm
epidermis and nervous tissue
what parts are derived from the endoderm
gut lining, respiratory tract, thymus