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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 organs are located retroperitoneally on the posterior abdominal wall?
A. Kidneys
B. Lungs
C. Heart
D. Ovaries only
Read Theory
Correct Answer: A
The kidneys are retroperitoneal organs situated on the posterior abdominal wall.
CSS - PMS - CCE - PCS - General Science Organs
Which organ lies behind the stomach and has both digestive and hormonal functions?
A. Pancreas
B. Spleen
C. Thymus
D. Bladder
Read Theory
Correct Answer: A
The pancreas lies retroperitoneally behind the stomach and has exocrine and endocrine roles.
CSS - PMS - CCE - PCS - General Science Organs
Which membranes protect the brain and spinal cord?
A. Meninges
B. Pleurae
C. Peritoneum
D. Pericardium
Read Theory
Correct Answer: A
The meninges consist of dura mater, arachnoid mater and pia mater.
CSS - PMS - CCE - PCS - General Science Organs
Which membrane lines much of the abdominal cavity and covers many abdominal organs?
A. Pleura
B. Peritoneum
C. Pericardium
D. Meninges
Read Theory
Correct Answer: B
The peritoneum lines the abdominal cavity and covers many abdominal organs.
CSS - PMS - CCE - PCS - General Science Organs
Which is the largest and strongest bone in the human body?
A. Humerus
B. Femur
C. Tibia
D. Fibula
Read Theory
Correct Answer: B
The femur is the longest, largest and strongest bone in the human body.
CSS - PMS - CCE - PCS - General Science Organs
Which bones primarily protect the heart and lungs?
A. Ribs
B. Femur
C. Tibia
D. Radius
Read Theory
Correct Answer: A
The rib cage protects the heart and lungs.
CSS - PMS - CCE - PCS - General Science Organs
Which bone protects the brain?
A. Sternum
B. Skull
C. Pelvis
D. Femur
Read Theory
Correct Answer: B
The skull, especially the cranium, encloses and protects the brain.
CSS - PMS - CCE - PCS - General Science Organs
Which organ system provides structural support and protects internal organs?
A. Skeletal system
B. Endocrine system
C. Digestive system
D. Urinary system
Read Theory
Correct Answer: A
The skeletal system supports the body and protects organs such as the brain, heart and lungs.
CSS - PMS - CCE - PCS - General Science Organs
Which tissue produces most blood cells in adults?
A. Bone marrow
B. Thyroid
C. Pancreas
D. Gallbladder
Read Theory
Correct Answer: A
Red bone marrow is the principal site of hematopoiesis in adults.
CSS - PMS - CCE - PCS - General Science Organs
Which organ is most important for T-cell development in children?
A. Thymus
B. Spleen
C. Liver
D. Pancreas
Read Theory
Correct Answer: A
The thymus provides an environment for T-cell maturation.
CSS - PMS - CCE - PCS - General Science Organs
Which small lymphatic structures filter lymph fluid?
A. Lymph nodes
B. Nephrons
C. Alveoli
D. Villi
Read Theory
Correct Answer: A
Lymph nodes filter lymph and house immune cells.
CSS - PMS - CCE - PCS - General Science Organs
Which organ acts as a blood filter and is part of the lymphatic system?
A. Spleen
B. Pancreas
C. Gallbladder
D. Kidney
Read Theory
Correct Answer: A
The spleen is a lymphoid organ that filters blood and supports immune function.
CSS - PMS - CCE - PCS - General Science Organs
Which pigment largely determines skin color and protects against ultraviolet radiation?
A. Hemoglobin
B. Melanin
C. Keratin
D. Bilirubin
Read Theory
Correct Answer: B
Melanin is produced by melanocytes and helps protect tissues from UV radiation.
CSS - PMS - CCE - PCS - General Science Organs
Sweat glands help regulate body temperature mainly through which process?
A. Filtration
B. Evaporation
C. Digestion
D. Osmosis only
Read Theory
Correct Answer: B
Evaporation of sweat removes heat from the body surface.
CSS - PMS - CCE - PCS - General Science Organs
Which is the outermost major layer of the skin?
A. Dermis
B. Epidermis
C. Hypodermis
D. Peritoneum
Read Theory
Correct Answer: B
The epidermis is the outer epithelial layer of skin.
CSS - PMS - CCE - PCS - General Science Organs
Which organ protects the body, helps regulate temperature and provides sensation?
A. Skin
B. Spleen
C. Pancreas
D. Thymus
Read Theory
Correct Answer: A
The skin acts as a barrier, assists thermoregulation and contains sensory receptors.
CSS - PMS - CCE - PCS - General Science Organs
Which organ contains taste buds?
A. Tongue
B. Larynx
C. Pharynx
D. Esophagus
Read Theory
Correct Answer: A
Taste buds are concentrated on papillae of the tongue, with additional sites in the oral cavity.
CSS - PMS - CCE - PCS - General Science Organs
Which sensory organ detects odors?
A. Tongue
B. Nose
C. Ear
D. Skin
Read Theory
Correct Answer: B
Olfactory receptors in the nasal cavity detect odors.
CSS - PMS - CCE - PCS - General Science Organs
Which membrane is commonly called the eardrum?
A. Tympanic membrane
B. Pleura
C. Peritoneum
D. Retina
Read Theory
Correct Answer: A
The tympanic membrane vibrates in response to sound waves.
CSS - PMS - CCE - PCS - General Science Organs
Which inner ear structures are especially important for balance?
A. Semicircular canals
B. Cochlea only
C. Tympanic membrane
D. Auditory ossicles
Read Theory
Correct Answer: A
The semicircular canals detect rotational head movements and contribute to balance.
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