Question

PLEASE HELP I'll MARK THE BRAINLIEST

1.) A vessel that carries oxygen-rich blood to the heart muscle is called a(n): *

A.) Coronary Artery

B.) Vein

C.) Ventricle

D.) Atrium


2.) A group of cells that receives messages about the body's oxygen needs and sends out signals to adjust the heart rate is called the: *

A.) Atrium

B.) Lymph Node

C.) Valve

D.) Pacemaker


3.) Blood components that helps the body control bleeding are: *

A.) Hemoglobin

B.) Red Blood Cells

C.) White Blood Cells

D.) Platelets


4.) Plasma is mostly composed of: *

A.) Blood Cells

B.) Water

C.) Proteins

D.) Hemoglobin


5.) Which of the following is NOT a characteristic of a vein? *

A.) Valves prevent backward flow of blood

B.) Returns blood to the heart

C.) Walls are one cell thick

D.) Walls are generally thinner than those of arteries


6.) The largest artery in the body is called the: *

A.) Aorta

B.) Atrium

C.) Pacemaker

D.) Coronary Artery


7.) The network of vessels that returns fluid to the bloodstream is called the: *

A.) Lymphatic System

B.) Veins

C.) Arteries

D.) Circulatory System


8.) Hemoglobin is a protein that binds easily to: *

A.) White Blood Cells

B.) Oxygen

C.) Fibrin

D.) Platelets


9.) Which of the following structures pumps blood into arteries leading to the lungs? *

A.) Right Atrium

B.) Left Atrium

C.) Right Ventricle

D.) Left Ventricle


10.) Which of the following structures is NOT part of the cardiovascular system? *

A.) Heart

B.) Blood Vessels

C.) Brain

D.) Blood


11.) True/False: The force of the heart's contracting atria causes blood pressure. *

A.) True

B.) False


12.) True/False: Capillary walls must be very thick to withstand the high force of blood pumped by the heart. *

A.) True

B.) False


13.) True/False: White blood cells defend the body against disease. *

A.) True

B.) False


14.) True/False: Blood travels in two directions in the body. *

A.) True

B.) False


15.) True/False: Blood types are determined by proteins known as marker molecules that are on red blood cells. *

A.) True

B.) False


16.) Fill in the Blank: The right and left __________________ are the two lower chambers of the heart. *


17.) Fill in the Blank: A sphygmomanometer is an instrument that measures ____________________________. *


18.) Fill in the Blank: A flap of tissue that prevents blood from flowing backward is a(n) ______________. *


19.) List two of the three main roles of the cardiovascular system: *


20.) Tell me anything else that you learned in science about the cardiovascular system:

Answer 1

Answer:

coronary arteries

Oxygen is supplied to the heart muscle by the coronary arteries. These are the blood vessels that wrap around the surface of the heart: The left main coronary artery branches into the: Circumflex coronary artery, which supplies blood to the back left side of the heart

Answer 2

Answer:

Answers:

1.)- Coronary Artery

2.)- Pacemaker

3.)- Red Blood Cells

4.)- Water

5.)- Walls are one cell thick

6.)- Aorta

7.)- Lymphatic System

8.)- Oxygen

9.)- Right atrium

10.)- Brain

11.)- False

12.)- True

13.)- True

14.)- False

15.)- True

16.)- Ventricles

17.)-  Blood pressure

18.)- valve

19.) The cardiovascular system consists of the heart, blood vessels, and blood. This system has three main functions: Transport of nutrients, oxygen, and hormones to cells throughout the body and removal of metabolic wastes (carbon dioxide, nitrogenous wastes).

20.) Random Facts:

The average heart is the size of a fist in an adult.

Your heart will beat about 115,000 times each day.

Your heart pumps about 2,000 gallons of blood every day.

Explanation:

:3 took a long time but ya