What are the 4 primary functions of the respiratory system?

1) exTchange of gas between atmosphere and blood

2) Homeostatic regulation of body pH

3) protection from inhaled pathogens and irritating substances

4) vocalization

Which of the following is a unicellular organism? A. Bacteria B. Bird C. Fish D. Flower

Marine or navy which would you chose

Compare Earth and the moon in terms of size and surface gravity.

Cosa sono i celenterati?

A scientific theory is an explanation that a-has been published in a journal or book. b-predicts what will happen. c-has been tested by many observations. d-a scientist has tested with an experiment.

The role of the excretory system is to rid the body of toxic waste products. Which of the following body systems also plays a direct role in removing waste products from the body? A) endocrine B) nervous C) respiratory D) skeletal

What supplement might be recommended by the food and nutrition board?

Which reflex constricts pupils when we view lose objects?

What survival stimulus makes an animal thirsty?

Factors that have contributed to heterogamy include