Blood Components and Functions

The video explains the role of blood in the body, focusing on platelets. Blood circulates through vessels, carrying essential materials. Platelets, or thrombocytes, are cell fragments produced in the bone marrow, crucial for stopping bleeding and healing wounds by forming clots. When an injury occurs, platelets form a plug at the site, strengthened by fibrin, which helps in clot formation and healing. The video concludes by emphasizing the importance of platelets in maintaining body health.

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

• To filter blood

• To store blood

• To supply blood to the body

• To produce blood

Which of the following is NOT a component of blood?

• White blood cells

• Red blood cells

• Nerve cells

• Platelets

What is another name for platelets?

• Thrombocytes

• Leukocytes

• Erythrocytes

• Lymphocytes

Where are platelets produced in the body?

• Liver

• Bone marrow

• Lungs

• Heart

What is the primary role of platelets in the body?

• To carry nutrients

• To fight infections

• To transport oxygen

• To stop bleeding

What happens when blood vessels are damaged?

• Blood flow stops completely

• Blood clots form

• Blood vessels expand

• Blood pressure increases

Which protein strengthens the platelet plug during clot formation?

• Hemoglobin

• Albumin

• Fibrin

• Collagen

What forms on the skin as it heals from an injury?

• A rash

• A scab

• A bruise

• A blister