The human organism has systems for respiration and circulation. These systems interact with each other. Label the parts and distinguish among the function of the major organs of the circulatory system, including heart, arteries, veins, capillaries, and blood cells. Describe how the respiratory and circulatory systems work together to carry gases to and from the body. Disease is a breakdown in structures or functions of an organism.
Some diseases are the result of intrinsic failures of the system.
Infer common intrinsic diseases and disorders associated with the respiratory system, such as asthma, and with the circulatory system, such as leukemia, sickle cell, and heart diseases. B. Populations and Ecosystems 1. A population consists of all individuals of a species that occur together at a given place and time. All populations live together and the physical factors with which they interact compose an ecosystem. Define a population.