Why is it necessary for the trachea to have rings of cartilage in its walls?

Match the term with its descrption: septum thorax vocal cords mucus trachea alveoli sinus bronchus 1. thick, sticky substance 2. chest area 3. air sacs 4. cartilage dividing nose in two parts 5. mucous folds in voice box 6. windpipe 7.

When tissues are damaged, they undergo regeneration. In this process, ___ remove dead or injured cells, while other cells divide and begin to repair the wound.

Excess amounts of water soluble vitamins are excreted via the

Deanna explains to Wesley the different types of nitrogen in the nitrogen cycle. Choose the sentences that she includes in her explanation. Select all that apply. A. Bacteria fix nitrogen from ammonia gas. B.

Sensory information from proprioceptors about joint and muscle positions are carried to the brain by the: Sensory information from proprioceptors about joint and muscle positions are carried to the brain by the: anterolateral system (spinothalamic

Many toxins and poisons block certain enzymes in the mitochondria. For example, many fruits, including apricots, apples, plums, peaches, and cherries, contain seeds and pits that can cause the formation and release of the poison cyanide if they are

In a classroom system, the students produce an output of information on tests and homework. This information becomes an input for the grading part of the system. Which statement about the output of the students is true? A.

In two or more complete sentences describe how a dam placed in a river can act as both a constructive and destructive force.

When enough experimental data support a hypothesis, the hypothesis becomes a what

Which part of the central nervous system is used to serve as the main communications link between the body and the brain