Human body structure ✔️✔️1. Atoms
2.Molecules
3. Cells
4. Tissues
5. Organs
6. Organ systems
7. Organism
Which organ is responsible for filtering waste from the blood?
A) Liver
B) Pancreas
C) Kidney ✔️✔️
D) Gallbladder
What type of muscle is found in the walls of hollow organs, such as the intestines and blood vessels?
A) Cardiac muscle
B) Smooth muscle ✔️✔️
C) Skeletal muscle
D) Voluntary muscle
Which part of the eye adjusts to control the amount of light entering?
A) Retina
B) Cornea
C) Iris ✔️✔️
D) Lens
, The primary function of the pulmonary veins is to:
A) Carry oxygenated blood from the lungs to the heart ✔️✔️
B) Transport deoxygenated blood to the lungs
C) Regulate blood pressure
D) Deliver nutrients to body tissues
Which part of the brain is involved in controlling heart rate, breathing, and blood pressure?
A) Cerebellum
B) Medulla oblongata ✔️✔️
C) Cerebrum
D) Thalamus
Which structure in the digestive system prevents acid reflux?
A) Pyloric sphincter
B) Cardiac sphincter ✔️✔️
C) Ileocecal valve
D) Epiglottis
Where does gas exchange primarily occur in the respiratory system?
A) Trachea
B) Bronchi
C) Alveoli ✔️✔️
D) Bronchioles
Which layer of the skin contains sweat glands and hair follicles?
A) Epidermis
B) Dermis ✔️✔️