Complete the passage to describe the function of the heart.

Question

The pumping of the heart involves the alternate contraction and relaxation of the chambers of the heart. The upper chambers of the heart are called___
, and the lower chambers of the heart are called___
.

Answer 1

The pumping of the heart involves the alternate contraction and relaxation of the chambers of the heart. The upper chambers of the heart are called atria, and the lower chambers of the heart are called ventricles. The atria receive blood that comes into the heart, while the ventricles pump blood out of the heart to the lungs and the rest of the body. This coordinated action is essential for maintaining the circulation of blood and delivering oxygen and nutrients to tissues throughout the body.

Answer 2

Which statements are true about the flow of blood in the body? Check all that apply.

Blood picks up oxygen from the cells of the body.
Blood delivers carbon dioxide to cells in the body.
Blood picks up carbon dioxide from the cells of the body.
Blood flows from the heart to the lungs to pick up oxygen.
Blood delivers sugar and nutrients to cells in the body.
Blood flows from the lungs to the heart to pick up oxygen.

Answer 3

Here are the statements evaluated for their truth regarding the flow of blood in the body:

1. Blood picks up oxygen from the cells of the body. - False (Blood releases oxygen to the cells, not picks it up.)
2. Blood delivers carbon dioxide to cells in the body. - False (Blood picks up carbon dioxide from the cells and carries it to the lungs for exhalation.)
3. Blood picks up carbon dioxide from the cells of the body. - True (Blood picks up carbon dioxide from cells as a waste product of metabolism.)
4. Blood flows from the heart to the lungs to pick up oxygen. - True (Blood is pumped from the right side of the heart to the lungs to receive oxygen.)
5. Blood delivers sugar and nutrients to cells in the body. - True (Blood carries glucose and other nutrients from the digestive system to cells throughout the body.)
6. Blood flows from the lungs to the heart to pick up oxygen. - False (Blood flows from the lungs to the heart after picking up oxygen, so it's delivering oxygen to the heart, not picking it up.)

So the true statements are: 3, 4, and 5.

Answer 4

What is the function of the different components of blood?

red blood cell:

white blood cell:

platelet:

plasma:

Answer 5

Here are the functions of the different components of blood:

Red Blood Cell (Erythrocyte):
The primary function of red blood cells is to transport oxygen from the lungs to the tissues and carbon dioxide from the tissues back to the lungs. They contain hemoglobin, a protein that binds to oxygen, allowing efficient gas exchange.

White Blood Cell (Leukocyte):
White blood cells are part of the immune system and are responsible for protecting the body against infections and foreign invaders. They play a critical role in immune response, fighting off pathogens, and can be involved in allergic reactions and inflammation.

Platelet (Thrombocyte):
Platelets are small cell fragments involved in blood clotting. Their primary function is to help stop bleeding by clumping and forming a plug at the site of a blood vessel injury. They release chemical signals that promote the clotting process and work with proteins in the plasma to form a stable clot.

Plasma:
Plasma is the liquid component of blood, making up about 55% of its volume. It serves several functions, including transporting nutrients, hormones, and proteins throughout the body. Plasma also carries waste products to be excreted and plays a crucial role in maintaining blood pressure and volume, as well as regulating body temperature and pH balance.

Answer 6

What is the function of the different components of blood?

red blood cell:
✔ binds and carries oxygen

white blood cell:
✔ fights pathogens that can cause sickness

platelet:
✔ helps in the healing of cuts and wounds

plasma:
✔ contains the liquid portion of blood

Which structure of the respiratory system connects the pharynx to the trachea?

bronchi
larynx
nasal cavity
lungs

Answer 7

The structure of the respiratory system that connects the pharynx to the trachea is the larynx.

Summary:

• Red blood cell: ✔ binds and carries oxygen
• White blood cell: ✔ fights pathogens that can cause sickness
• Platelet: ✔ helps in the healing of cuts and wounds
• Plasma: ✔ contains the liquid portion of blood

Respiratory System Component:

• Connects the pharynx to the trachea: larynx (correct answer)

The other options:

• Bronchi are the branches that lead from the trachea into the lungs.
• Nasal cavity is responsible for filtering and humidifying air before it enters the lungs.
• Lungs are the organs where gas exchange occurs but do not connect the pharynx to the trachea.

Answer 8

larynx

Which statements explain the gas exchange that happens at the alveoli? Check all that apply.

Carbon dioxide moves from the air in the alveoli to the blood.
Carbon dioxide moves from the blood to the air in the alveoli.
The capillaries that surround the alveoli exchange both carbon dioxide and oxygen.
The capillaries that surround the alveoli exchange only oxygen.
Oxygen is absorbed by the blood in the capillaries that surround the alveoli.
Oxygen is the air we breathe out when we exhale.

Answer 9

Here are the statements evaluated for their accuracy regarding gas exchange that occurs at the alveoli:

1. Carbon dioxide moves from the air in the alveoli to the blood. - False (Carbon dioxide moves in the opposite direction, from the blood to the air in the alveoli.)

2. Carbon dioxide moves from the blood to the air in the alveoli. - True (Carbon dioxide is released from the blood into the alveoli to be exhaled.)

3. The capillaries that surround the alveoli exchange both carbon dioxide and oxygen. - True (Gas exchange in the alveoli involves the transfer of both carbon dioxide from the blood to the alveoli and oxygen from the alveoli to the blood.)

4. The capillaries that surround the alveoli exchange only oxygen. - False (The capillaries exchange both carbon dioxide and oxygen, not just oxygen.)

5. Oxygen is absorbed by the blood in the capillaries that surround the alveoli. - True (Oxygen diffuses from the alveoli into the blood in the capillaries.)

6. Oxygen is the air we breathe out when we exhale. - False (When we exhale, we primarily breathe out carbon dioxide and a smaller amount of oxygen.)

True Statements:

• 2. Carbon dioxide moves from the blood to the air in the alveoli.
• 3. The capillaries that surround the alveoli exchange both carbon dioxide and oxygen.
• 5. Oxygen is absorbed by the blood in the capillaries that surround the alveoli.