Organs in the Human Body

Introduction

What Are Organs?

• An organ is a collection of tissues functioning together for a common purpose.
• Organs are essential for the functioning of organ systems like the digestive, respiratory, and circulatory systems.
• The human body has 78 discovered organs.

List of Organs (Selected)

• Adrenal glands, appendix, bladder, bones, brain, bronchi, diaphragm, ears, eyes, heart, kidneys, liver, lungs, skin, small intestine, stomach, etc.

10 Most Vital Organs

1. Skin

• Largest organ, regulates body temperature and protects internal organs.
• Contains sweat and oil glands.

2. Brain

• Controls vital functions like digestion and heart rate.
• Receives nerve impulses and responds to stimuli.

3. Heart

• Pumps oxygenated blood throughout the body.
• Beats over 2.5 million times in an average lifetime.

4. Kidneys

• Filter blood and produce urine.
• Regulate blood pressure through renin production.

5. Liver

• Produces bile, filters toxins, and regulates blood sugar.
• Largest internal organ.

6. Pancreas

• Produces digestive enzymes and regulates blood sugar.

7. Stomach

• Digests food with enzymes and sends it to the small intestine.

8. Small Intestine

• Absorbs nutrients and transfers them to blood.
• About 5 meters long.

9. Large Intestine

• Absorbs water from food waste.
• About 1.5 meters long.

10. Lungs

• Facilitate gas exchange (oxygen and carbon dioxide).

COVID-19 Organ Damage

Can COVID-19 Damage Organs?

• COVID-19 can damage lungs, heart, kidneys, liver, and brain.
• Utilizes ACE2 receptors to invade cells.

Organ Damage and Complications

Lung Damage

• Can cause pneumonia and acute respiratory distress syndrome (ARDS).
• Leads to breathing problems and potential long-term complications.

Heart Damage

• Linked to myocardial injury, heart failure, and arrhythmias.

Kidney Damage

• Evidence of kidney impairment and tissue damage.
• Often involves a cytokine storm.

Liver Damage

• Increased liver enzymes indicate damage.

Nervous System Damage

• Neurological symptoms observed in infected patients.
• Symptoms include dizziness, headaches, and loss of taste and smell.

Frequently Asked Questions

• Organs on the left side: Includes left lung, left kidney, part of the stomach, spleen.
• Second largest organ: Liver, crucial for detoxification and nutrient storage.
• Heaviest body part: Torso, containing major organs.
• Smallest organ: Pineal gland, regulates circadian rhythms.