Systems of the human body

What is the function of the respiratory system?

The respiratory system is responsible for gas exchange, allowing oxygen to be taken in and carbon dioxide to be expelled.

What is cellular respiration?

A chemical process that requires oxygen and produces carbon dioxide, water, and energy from glucose.

What structures are involved in the respiratory system?

Nose, nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli, and lungs.

What is the function of alveoli?

Alveoli are air sacs where gas exchange occurs, allowing oxygen to enter the blood and carbon dioxide to leave.

What is the diaphragm's role in breathing?

The diaphragm contracts and relaxes to change thoracic pressure, facilitating inhalation and exhalation.

What are the components of blood?

Blood is made up of plasma, red blood cells, white blood cells, and platelets.

What is the circulatory system's main function?

To transport oxygen, nutrients, and waste products throughout the body via the heart and blood vessels.

How does double circulation work?

Blood passes through the heart twice: first through the pulmonary circuit (to the lungs) and then through the systemic circuit (to the rest of the body).

What is the path of blood through the heart?

Body → right atrium → right ventricle → lungs → left atrium → left ventricle → body.

What is the journey of food through the digestive system?

Mouth → esophagus → stomach → small intestine → large intestine → rectum → anus.

What is the difference between physical and chemical digestion?

Physical digestion involves breaking down food into smaller pieces, while chemical digestion involves breaking down food into smaller molecules through enzymes.

What are enzymes' roles in digestion?

Enzymes speed up the breakdown of food substances without being consumed themselves.

What is the function of the liver in digestion?

The liver produces bile to assist in the digestion and absorption of fats.

What is the function of the gallbladder?

The gallbladder stores bile until it is needed in the small intestine.