What is the primary function of surfactant in the lungs?

The respiratory control centers, which regulate the rate and depth of breathing, are located in the: 

Cardiac muscle tissue is __________ and __________.

What structure stores calcium ions needed for muscle contraction?

The os coxae is joined anteriorly at the ____________ and posteriorly at the _________.

Another name for the tail bone is the __________:

Receptors are __________ nerve endings of __________nerves.

The nose has the ____________, which aids in the sense of smell.

In which part of the digestive system does most chemical digestion occur?

Muscular condition in which certain muscles become shorter, permanently bending the joints.