30 Questions
What are the two fluids that move through the circulatory system?
Blood and lymph
What type of circulatory system do vertebrates have?
Closed circulatory system
What English doctor showed that blood circulated throughout the body in one-way vessels?
Dr. William Harvey
What is the central organ of the cardiovascular system?
Heart
What type of system is responsible for transporting nutrients and hormones to cells and removing waste products from cells?
Cardiovascular System
What is the name of the system that collects and transports the fluid called lymph?
Lymphatic System
What type of tissue makes up the middle layer of the heart's walls?
Cardiac muscle
What ensures that the cardiac muscle gets plenty of oxygen?
The coronary artery
What is the primary reason cardiac muscle cannot develop cramp?
It cannot respire anaerobically
Which statement about the heart is true?
The heart is cone-shaped
How many times does the average human heart beat in a lifetime?
Over 2.5 million times
What type of muscle cells are richly supplied with mitochondria?
Cardiac muscle cells
What is the main function of blood?
Transport nutrients and oxygen to cells
Which component makes up the majority of blood composition?
Plasma
If lymph builds up around the ankles and feet, what is this condition called?
Oedema
What happens to the lymph if a person is inactive or has high blood pressure?
It builds up in tissues
Which gland disappears from the body after the age of 10?
Thymus gland
What is a simple precaution to prevent DVT during long-distance flights?
Moving feet and ankles regularly during the flight
What is the turnover rate of red blood cells (RBCs) according to the text?
2 million per second
Which of the following is NOT a characteristic of white blood cells (WBCs) according to the text?
Full of haemoglobin
How do red blood cells (RBCs) differ from white blood cells (WBCs) in terms of lifespan according to the text?
RBCs have a shorter lifespan than WBCs
Which feature allows red blood cells (RBCs) to pass through the smallest capillaries?
Biconcave shape
What is the main function of lymphocytes among white blood cells (WBCs) according to the text?
Produce antibodies
In which part of the body are white blood cells (WBCs) formed according to the text?
Bone marrow
What is the primary function of Granulocytes (Cell B)?
Destroy bacteria by ingestion (phagocytosis)
How do Platelets contribute to blood clotting?
Adhering to the wound site and releasing clotting factors
What can happen if there is unwanted clotting of blood within blood vessels?
Brain cells may die causing a stroke
What is the function of Lymphocytes (Cell A)?
Make antibodies or kill infected cells
What is the lifespan of Platelets?
7-11 days
What determines a person's blood group?
Presence of antigens on RBC surfaces
Explore the functioning of the circulatory system and the lymphatic system in the human body. Learn about the roles of blood, lymph, heart, blood vessels, lymph nodes, and lymph vessels in maintaining a healthy transport system for cells.
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