Zoology

Zoology

Contributors in Zoology

Zoology

Body cavity formed between the mouth and anus in which food is digested and nutrients absorbed; it consists of the mouth, pharynx, esophagus, stomach, intestine, and anus, though some animals do not ...

Epithelium

Biology; Zoology

Layer of cells which lines a body cavity; cells may be ciliated or unciliated, and may be squamous (flat, scale-shaped), cuboidal (cube-shaped), or columnar (column-shaped). Your stomach and cheeks ...

Endoderm

Biology; Zoology

The innermost basic layer of tissue in those animals with true tissues. Forms the gut and its derivatives: in vertebrates, these include the liver, trachea, and lungs.

Ectoderm

Biology; Zoology

The outer basic layer of tissue in those animals with true tissues. In vertebrates, for instance, the embryonic ectoderm differentiates into the skin and also the nervous system.

Amniotic egg

Biology; Zoology

An egg that can be laid on land due to the presence of a fluid-filled amniotic sac (amnion) that cushions and protects the developing embryo. amniote - n. Any of a group of land-dwelling vertebrates ...

Ambulacra

Biology; Zoology

Row of tube feet of an echinoderm.

Altricial

Biology; Zoology

Refers to animals with young that are unable to move on their own after hatching or birth, and require extensive parental care. Songbirds, dogs, and humans are examples of species with altricial ...