Circulatory System Quiz

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What type of muscle makes up the walls of the heart?

Cardiac muscle (correct)
Striated muscle
Smooth muscle
Skeletal muscle

What are the chambers that receive blood returning to the heart called?

Arteries
Atria (correct)
Ventricles
Valves

What structure separates the atria from the ventricles in the heart?

Endocardium
Pericardium
Septum (correct)
Myocardium

Which side of the heart pumps oxygen-poor blood to the lungs?

Right side (C) Signup and view all the answers

What is the primary function of the human heart?

To pump blood throughout the body (B) Signup and view all the answers

What type of circulatory system does a grasshopper have?

Open circulatory system (A) Signup and view all the answers

What function do the aortic arches serve in an earthworm's circulatory system?

They act as a heart to pump blood (C) Signup and view all the answers

Why do organisms like vertebrates require a closed circulatory system?

To keep blood under pressure and contained (A) Signup and view all the answers

What is one main function of the circulatory system?

To regulate internal body temperature and transport vital chemical substances (A) Signup and view all the answers

What substance is circulated in the open circulatory system of a grasshopper?

Hemolymph (C) Signup and view all the answers

Which of the following animals is NOT mentioned as having a closed circulatory system?

Grasshopper (A) Signup and view all the answers

What are the major components of the circulatory system?

Heart, blood vessels, and blood (B) Signup and view all the answers

Which type of circulatory system allows blood to flow freely within the body cavity?

Open circulatory system (D) Signup and view all the answers

What role do the atrioventricular and semilunar valves play in the circulatory system?

They regulate blood flow within the heart (A) Signup and view all the answers

What is the primary function of blood in the circulatory system?

To transport nutrients, oxygen, and waste materials (C) Signup and view all the answers

In which organisms is an open circulatory system commonly found?

Invertebrates (D) Signup and view all the answers

What is the role of the pulmonary arterial system?

To carry carbon dioxide-rich blood to the lungs (A) Signup and view all the answers

What is vasodilation?

The widening of blood vessels (C) Signup and view all the answers

What is the primary purpose of the mammalian circulatory system?

To deliver oxygen and remove waste products (D) Signup and view all the answers

Which part of the double circulatory system is responsible for picking up oxygen?

Pulmonary circulation (A) Signup and view all the answers

What percentage of blood is typically found in systemic circulation at any given time?

80-90% (D) Signup and view all the answers

What drives blood through the circulatory system?

The heart (B) Signup and view all the answers

What is referred to as blood flow through the heart muscle?

Cardiac circulation (A) Signup and view all the answers

What type of blood does the superior vena cava carry?

Oxygen-poor blood from the head (D) Signup and view all the answers

What is the primary function of the left ventricle?

Pumping oxygen-rich blood to the body (A) Signup and view all the answers

Which chamber of the heart receives blood from the lungs?

Left atrium (B) Signup and view all the answers

What distinguishes the pulmonary arteries from other arteries in the circulatory system?

They carry oxygen-poor blood (D) Signup and view all the answers

What is the function of the atrioventricular valves?

They separate the atria from the ventricles (A), They prevent backflow of blood (B) Signup and view all the answers

What term is used for the valve located on the right side of the heart?

Tricuspid valve (D) Signup and view all the answers

Where does the oxygen-poor blood go after it leaves the right ventricle?

Into the pulmonary trunk (A) Signup and view all the answers

What type of blood is carried by the pulmonary veins?

Oxygen-rich blood (B) Signup and view all the answers

What role do arteries play in the circulatory system?

They carry blood away from the heart. (C) Signup and view all the answers

What is a distinguishing feature of veins compared to arteries?

Veins have one-way valves. (A) Signup and view all the answers

How do muscles assist veins in the circulation of blood?

Muscles help move blood toward the heart. (B) Signup and view all the answers

What feature of capillaries allows for the exchange of materials?

One-cell-thick walls. (B) Signup and view all the answers

What does the rhythm that you feel when measuring your pulse represent?

The wave of blood surging through arteries. (B) Signup and view all the answers

What happens when blood flows through one-way valves in the veins?

Blood can only flow in one direction. (A) Signup and view all the answers

What characteristic of capillaries restricts red blood cells to pass through in single file?

The average diameter of capillaries is about 8 µm. (B) Signup and view all the answers

What is the primary function of arterioles?

To regulate blood flow from arteries. (C) Signup and view all the answers

Open Circulatory System

Hemolymph is pumped into body cavity, then re-enters vessels through pores.

Closed Circulatory System

Blood stays in vessels, under pressure, circulates rapidly.