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CSS - PMS - CCE - PCS - General Science Practice

Human Organs – Major Organs, Functions, Systems & Important Facts MCQs

Study the major organs of the human body, their locations, functions and related organ systems. This topic covers the heart, brain, lungs, liver, kidneys, stomach, intestines, pancreas, spleen, skin and other important organs. Specially prepared for CSS, PMS, CCE, PCS, FPSC, PPSC and General Science competitive exams with exam-focused facts and MCQs.

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Human Organs – Major Organs, Functions, Systems & Important Facts

Human Organs – Major Organs, Functions, Systems & Important Facts MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Organs
Which chamber of the heart pumps oxygenated blood to the body?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Read Theory
Correct Answer: D
The left ventricle pumps oxygenated blood into the aorta for systemic circulation.
CSS - PMS - CCE - PCS - General Science Organs
How many chambers are present in the human heart?
A. Two
B. Three
C. Four
D. Five
Read Theory
Correct Answer: C
The human heart has two atria and two ventricles, making four chambers.
CSS - PMS - CCE - PCS - General Science Organs
The spinal cord is protected mainly by which structure?
A. Ribs
B. Vertebral column
C. Skull
D. Pelvis
Read Theory
Correct Answer: B
The vertebral column encloses and protects the spinal cord.
CSS - PMS - CCE - PCS - General Science Organs
Which lobe of the brain is important for planning, judgment and voluntary motor control?
A. Frontal lobe
B. Occipital lobe
C. Temporal lobe
D. Insula
Read Theory
Correct Answer: A
The frontal lobe contributes to executive functions and contains the primary motor cortex.
CSS - PMS - CCE - PCS - General Science Organs
Which lobe of the brain is strongly associated with hearing?
A. Temporal lobe
B. Occipital lobe
C. Frontal lobe
D. Parietal lobe
Read Theory
Correct Answer: A
The temporal lobe contains the primary auditory cortex.
CSS - PMS - CCE - PCS - General Science Organs
Which lobe of the brain is primarily associated with vision?
A. Frontal lobe
B. Occipital lobe
C. Temporal lobe
D. Parietal lobe
Read Theory
Correct Answer: B
The primary visual cortex lies in the occipital lobe.
CSS - PMS - CCE - PCS - General Science Organs
Which gland in the brain secretes melatonin?
A. Pituitary gland
B. Pineal gland
C. Thyroid gland
D. Thymus
Read Theory
Correct Answer: B
The pineal gland secretes melatonin and helps regulate circadian rhythms.
CSS - PMS - CCE - PCS - General Science Organs
Which gland is located at the base of the brain and is often called the master gland?
A. Thyroid
B. Pituitary
C. Adrenal
D. Pineal
Read Theory
Correct Answer: B
The pituitary regulates several endocrine glands through its hormones.
CSS - PMS - CCE - PCS - General Science Organs
Which brain structure helps regulate body temperature, hunger and thirst?
A. Hypothalamus
B. Cerebellum
C. Corpus callosum
D. Occipital lobe
Read Theory
Correct Answer: A
The hypothalamus is a major homeostatic control center.
CSS - PMS - CCE - PCS - General Science Organs
Which part of the brain controls vital functions such as breathing and heart rate?
A. Cerebellum
B. Medulla oblongata
C. Frontal lobe
D. Parietal lobe
Read Theory
Correct Answer: B
The medulla oblongata contains centers that help regulate breathing, heart rate and blood pressure.
CSS - PMS - CCE - PCS - General Science Organs
Which part of the brain coordinates balance and fine movements?
A. Cerebrum
B. Cerebellum
C. Hypothalamus
D. Medulla
Read Theory
Correct Answer: B
The cerebellum coordinates posture, balance and fine motor activity.
CSS - PMS - CCE - PCS - General Science Organs
Which part of the brain is mainly responsible for thinking, memory and voluntary actions?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Pons
Read Theory
Correct Answer: A
The cerebrum is responsible for higher mental functions, memory, sensation and voluntary movement.
CSS - PMS - CCE - PCS - General Science Organs
Which organ contains the vocal cords?
A. Pharynx
B. Larynx
C. Trachea
D. Esophagus
Read Theory
Correct Answer: B
The larynx, or voice box, contains the vocal cords.
CSS - PMS - CCE - PCS - General Science Organs
Which organ prevents food from entering the airway during swallowing?
A. Epiglottis
B. Pancreas
C. Spleen
D. Thymus
Read Theory
Correct Answer: A
The epiglottis helps cover the laryngeal inlet during swallowing.
CSS - PMS - CCE - PCS - General Science Organs
Which organ connects the throat to the stomach?
A. Trachea
B. Esophagus
C. Bronchus
D. Ureter
Read Theory
Correct Answer: B
The esophagus is the muscular tube that carries food from the pharynx to the stomach.
CSS - PMS - CCE - PCS - General Science Organs
Most water absorption from remaining intestinal contents occurs in which organ?
A. Stomach
B. Large intestine
C. Esophagus
D. Gallbladder
Read Theory
Correct Answer: B
The large intestine absorbs water and electrolytes from intestinal contents.
CSS - PMS - CCE - PCS - General Science Organs
Most nutrient absorption occurs in which organ?
A. Stomach
B. Small intestine
C. Large intestine
D. Esophagus
Read Theory
Correct Answer: B
Most digestion and nutrient absorption occur in the small intestine.
CSS - PMS - CCE - PCS - General Science Organs
Which organ is mainly responsible for digestion of food by acid and enzymes?
A. Stomach
B. Liver
C. Colon
D. Spleen
Read Theory
Correct Answer: A
The stomach secretes acid and digestive enzymes and mechanically mixes food.
CSS - PMS - CCE - PCS - General Science Organs
Which organ stores urine before it is excreted?
A. Kidney
B. Urinary bladder
C. Ureter
D. Urethra
Read Theory
Correct Answer: B
The urinary bladder temporarily stores urine before urination.
CSS - PMS - CCE - PCS - General Science Organs
Which organ produces bile?
A. Gallbladder
B. Liver
C. Pancreas
D. Small intestine
Read Theory
Correct Answer: B
The liver produces bile, which helps digest and absorb fats.
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