BIOA02H3 Lecture 5: BGYA02 - Lec5 (text+lec combined notes)

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erincheetah56

1 Feb 2012

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A circulatory system consists of a muscular pump (the heart), a fluid (the blood), and a series of conduits (the blood vessels) through which the fluid can be pumped around the body. Heart, blood and vessels are also known collectively as a cardiovascular system. The larger forms are more inactive, slow or even sedentary: larger and more active animals must support metabolism of cells by delivering nutrients to them and taking wastes away from them with circulatory systems. In many animals the extracellular fluid is continuous with fluid in the circulatory system. The vessels of these animals empty their fluid directly into the tissues. At other locations the fluid flows back into the circulatory system to be pumped back out again. Muscle pump assists distribution of fluid in these systems. Contractions of heart propel extracellular fluid through vessels to different regions of the body. Fluid leaves vessels to trickle through tissues and eventually return to the heart.

Related Questions

1. The anatomic position refers to the position in which a person is standing upright facing the observer, feet parallel and flat on the floor, and palms facing forward.

True

False

2. The study of how gases are transferred between the lungs and blood, and between the blood and body tissues, best describes the focus of

cardiovascular physiology.

respiratory physiology.

nervous system anatomy.

reproductive anatomy.

3. Which level of organization in the human body involves two or more tissue types working together to perform specific, complex functions?

Tissue level

Cellular level

Organismal level

Organ level

4. A patient complaining of pain on his left side just deep to the ribs would be referring to which abdominopelvic quadrant?

Left upper

Right upper

Right lower

Left lower

5. Homeostasis is BEST described as

a process in which the external environment has no influence on the internal environment.

the changes in the internal environment which have no influence on health.

the maintenance of a stable internal environment despite a changing external environment.

the prevention of changes internally despite external changes.

ochrepanda878

Why is an open circulatory system less efficient than a closedcirculatory system?

A. Metabolic wastes cannot be removed from tissues in an opencirculatory system.

B. Blood cannot be used to transport nutrients in an opencirculatory system.

C. There is no heart to pump the blood in an open circulatorysystem.

D. Open circulatory systems lack respiratory pigments that bindto oxygen.

E. It is more difficult to quickly deliver O₂ tospecific tissues when needed with an open circulatory system.

greymosquito430

what do the regulatory mechanisms of the body do? a) maintain absolute constancy of the internal environment b) function to accelerate changes in the internal environment c) operate independently of the internal condition of the body d) work to maintain a dynamic constancy of the internal environment

BIOA02H3 Lecture 5: BGYA02 - Lec5 (text+lec combined notes)

BIOA02H3 Full Course Notes

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