Human Physiology Quiz

Muscular System

• When you twist your waist, the two muscles on that side contract, while the two muscles on the other side relax.
• Muscle cells are long fibers that allow movement, and they work in bundles (tissues) to store and use energy.
• Skeletal muscles are working in pairs and move in opposite directions.
• They contract and relax to allow bones to move, and they can be controlled voluntarily.

Endocrine System

• The endocrine system consists of glands that secrete hormones that help the body prepare for different situations.
• It controls body temperature and blood pressure.
• During danger, the endocrine system secretes hormones that control the body's response, affecting other body systems.

Respiratory System

• The respiratory system consists of lungs, diaphragm, and airways.
• It provides the body with oxygen gas and gets rid of carbon dioxide gas.
• When the diaphragm muscle contracts, the lungs take in air rich in oxygen, and when it relaxes, the lungs release air rich in carbon dioxide.

Circulatory System

• The circulatory system depends on the lungs to function.
• When the heart beats quickly, it pumps more blood to the muscles and organs, increasing blood pressure.

Body as a System

• The body's systems work together in an integrated way to make the body function.
• Each system has a different function, but they all work together to respond to different situations.
• The body reacts differently in various situations, and body systems work together to produce physical responses.

Organization of the Human Body

• Cells are organized to form tissues, which form organs, and organs form systems.
• The muscular system, skeletal system, and nervous system work together to allow movement.
• Many simple tasks require different systems to work together, such as the respiratory, circulatory, nervous, excretory, and musculoskeletal systems.