- 行业: Education
- Number of terms: 4017
- Number of blossaries: 0
- Company Profile:
In eggshell, the shape, size, orientation, and distribution of components of the shell.
Industry:Biology
The chemical processes within an organic body that supply the energy necessary for life. The rate of metabolic processes is sometimes used as a way to differentiate organisms. For example, mammals generally have a higher metabolism than reptiles and can thus sustain higher levels of activity for longer periods of time.
Industry:Biology
Jellylike material between the outer ectoderm and the inner endoderm of cnidarians. May be very thin or may form a thick layer (as in many jellyfish).
Industry:Biology
In animals with three tissue layers (i.e. all except sponges and cnidarians), the middle layer of tissue, between the ectoderm and the endoderm. In vertebrates, for instance, the mesoderm forms the skeleton, muscles, heart, spleen, and many other internal organs.
Industry:Biology
A mammal that gives live birth to young that have gestated for only a short period of time. The young usually crawl into a pouch (the marsupium) or protected area and attach to their mother’s teat to finish developing. Examples of marsupials include kangaroos, opossums, and koalas.
Industry:Biology
In eggshell, the cone-like structure at the base of the shell unit where the shell unit attaches to the inner organic membrane.
Industry:Biology
Complex ring of hollow tentacles used as a feeding organ. The tentacles are covered by cilia, which generate a current to bring food particles into the mouth. The structure is only found in the brachiopods, phoronids, and bryozoans. More info?
Industry:Biology
When stiff body parts are connected by a soft flexible region, the body is said to be jointed.
Industry:Biology
The "free cheeks"; separate, detachable portions of the trilobite cephalon. More info?
Industry:Biology
Often loosely applied to any movable, toothed structures at or near the mouth of an animal, such as the scolecodonts of annelids. In vertebrates, the jaw is derived from the first gill arch.
Industry:Biology
