Chapter 47 Flashcards
1
Q
Blastula
A
the blastula is a ball of cells with fluid filled cavity called blastocoel
2
Q
fertilized eggs is followed by?
A
cleavage: a period of rapid cell division without growth
3
Q
what does cleavage produce?
A
cleavage gets to 16 cells in a solid ball called the marula, that then migrate to the blastula cavity (64)
4
Q
what is gastrulation?
A
follows blastula, movement of cells from the blastula surface to interior of embryo
5
Q
morphogenesis ?
A
the process by which cells occupy their appropriate locations and involves gastrulation and organogenesis
6
Q
what becomes the anus?
A
the blastopore becomes the anus
7
Q
ectoderm (outer layer is ecto)
A
- epidermis of skin and sweat glands and hair follicles
- nervous and sensory systems
- pituitary gland, adrenal medulla
- jaws and teeth
- germ cells
8
Q
mesoderm (middle layer is meso)
A
- skeletal and muscular systems
- circulatory and lymphatic systems
- excretory and reproductive systems (not germ)
- dermis of skin
- adrenal cortex
9
Q
endotherm (inner layer is endo)
A
- epithelial lining of digestive tract and organs (liver, pancreas)
- epithelial lining of respiratory, excretory, and reproductive tracts and ducts
- thymus, thyroid, and parathyroid
