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Zoology Lecture > Circulation > Flashcards

Circulation Flashcards

1
Q

Two parts of the frog circulatory system

A

cardiovascular system and
the lymphatic system

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2
Q

Main function of the two parts of the circulatory system

A

The main function of the cardiovascular system is to supply oxygen and nutrients to the tissues and to aid in the elimination of metabolic wastes while the lymphatic system drains the remaining plasma to the heart

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3
Q

How many chambers are there in a frog?

A

Three

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4
Q

Describe the heart’s color and position in the body

A

Dark red colored conical muscular organ situated mid-ventrally in the anterior part of the body cavity in between two lungs

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5
Q

What are the two membranes that enclose the heart?

A

inner epicardium and outer pericardium

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6
Q

What is the space between the two layers (membranes) that enclose the heart?

A

Pericardial Cavity

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7
Q

Functions of the Pericardial Cavity

A
  • Protects the heart from mechanical injury
  • Keeps the heart moist
  • Allows the free movement during beating
  • Also keeps in keeping the heart suspended in its proper position
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8
Q

DRAW THE HEART (DORSAL)

A

Two extra chambers:

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9
Q

DRAW THE HEART (VENTRAL)

A

Truncus arteriosus

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10
Q

What are the walls of blood vessels made of?

A
  • Outermost layer – tunica externa
  • Middle layer – tunica media
  • Inner layer – tunica interna
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11
Q

What are the characteristics of veins?

A
  • All blood in veins flows toward the heart
  • Thin walled and collapsible
  • Provided with semilunar valves that prevent backflow of the blood
  • Veins carry deoxygenated blood (except for pulmonary veins)
  • Blood flow through the veins under very low pressure
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12
Q

What are the six major veins?

A

A. PRECAVAL OR ANTERIOR VENA CAVA (2)
B. POSTCAVAL VEIN OR POSTERIOR VENA CAVA (single)
C. PULMONARY VEINS
D. ABDOMINAL VEIN (single)
E. HEPATIC PORTAL VEIN (single)
F. RENAL PORTAL VEIN

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13
Q

What are the characteristics of arteries?

A
  • Vessels that carry blood away from the heart
  • Strong and thick-walled vessels
  • Blood is transported to the different parts of the body under high pressure with great speed
  • Do not have valves
    Arteries carry oxygenated blood
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14
Q

What are the major arteries?

A

A. COMMON CAROTID ARTERY (anterior arch)
B. PULMO-CUTANEOUS ARTERY (posterior arch)
C. SYSTEMIC OR AORTIC ARCH (middle arch)

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15
Q
A

smallest and thinnest blood vessels
to facilitate the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues through its thin walls

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Zoology Lecture (10 decks)

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