Fertilization of the ova usually occurs in the __________.

__________ enables cross-bridging between the thick protein __________ and the thin protein __________.

Urethras enter the bladder at oblique angles so urine cannot backflow to the kidneys.

Which of the following are true concerning intervertebral discs?

The chamber of the heart with the thickest wall (because blood from its chamber will be distributed to the entire body) is the __________.

In DNA, adenine pairs with uracil.

The long fiber part of a neuron is called a(n) __________.

In DNA, adenine pairs with uracil.

The __________ is the tube down which food flows to the stomach.

The long fiber part of a neuron is called a(n) __________.