The Mesoderm

question 44

Multiple Choice

The mesoderm

• A) is located on the outside of the embryo.
• B) is formed during cleavage.
• C) is found in blastula-stage embryos.
• D) gives rise to the lining of the gut.
• E) lies between the endoderm and ectoderm.

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Definitions:

Bony Fishes

Fish that have skeletons primarily made of bone, as opposed to cartilaginous fishes, which have skeletons made of cartilage.

Keel Of The Sternum

The central ridge or projection on the sternum (breastbone) that resembles the keel of a boat, more prominent in some animals like birds for attachment of flight muscles.

Hollow

Having a space or cavity inside; not solid.

Flight Muscles

The muscles that power the wings in flying animals, enabling flight.