Explanation

The correct order of the alimentary canal, also known as the gastrointestinal (GI) tract:

• Mouth: Food enters the mouth, where it's chewed and mixed with saliva.
• Oesophagus: Food passes through the oesophagus, a muscular tube that transports it to the stomach.
• Stomach: The stomach secretes gastric juices to digest proteins and fats.
• Small Intestine: Nutrient absorption occurs in the small intestine, where specialized structures like villi and microvilli increase the surface area.

Explanation

• In the mouth, saliva contains the enzyme amylase.
• It starts the chemical digestion of carbohydrates (such as starches and sugars).
• By breaking them down into simpler sugars like maltose and dextrin.

Explanation

• The skin is the largest organ of the body, covering the entire surface of the body. 
• It has a total area of about 22 square feet (2 square meters).
• It weighs around 6 pounds (2.7 kilograms) in adults.

Explanation

• Lungs are two soft, spongy, large balloon-like organs located in the chest cavity, specifically in the thoracic cavity.
• They are responsible for exchanging oxygen and carbon dioxide through the process of respiration.

Explanation

• Elephants have large ears that help them to control their body temperature. 
• The ears are made up of thin skin and have many blood vessels close to the surface, which allows them to release excess heat.
• By flapping their ears, elephants can create a breeze that helps to cool themselves down.

Explanation

• When you swallow food, sweets, or drinks, they pass through the esophagus and enter the stomach.
• Where they are mixed with digestive enzymes and acids to break down proteins, carbohydrates, and fats.

Explanation

• The Brachial Artery is located in the Arm.
• ***
• The brachial artery. present in the Right upper limb
  
• The brachial artery is the major blood vessel supplying blood to your upper arm, elbow, forearm, and hand.
• It starts in your upper arm, just below your shoulder, and runs down through the crease in front of your elbow.
• It separates into several branches along its route.

Explanation

The skin is sensitive to:

• Temperature (hot and cold)
• Touch (light and heavy pressure)
• Pressure (firm and gentle)
• Pain (sharp and dull)

Explanation

The structure of the brain is similar to the structure of a Walnut, with both having:

• A hard outer layer (cranium vs. shell)
• A wrinkled surface (brain's cerebral cortex vs. walnut's surface)
• A distinct left and right half (brain's hemispheres vs. walnut's halves)

Explanation

• Over-eating can lead to obesity.
• While consuming spicy food can irritate the stomach lining.
• It potentially causing ulcers in susceptible individuals.