MCQs

Explanation
The nose has two holes, the nostrils, which take in air from our surroundings and pass it to the lungs through the nasal passages. The nose is responsible for breathing, smelling, and filtering the air we breathe.

Explanation
African elephants have larger ears than Asian elephants. African elephants live in the savannas and need protection from the sun. So their ears are bigger to help them stay cool.

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
The visible part of the ear is called the External Ear  It is also known as the Pinna or Auricle. It is the outer, cartilaginous structure that protrudes from the side of the head and collects sound waves , directing them into the ear canal.

Explanation
The Ear is made up of both internal and external parts. The external part is the visible outer ear. The internal parts include the middle ear and the inner ear. Which contain the cochlea and the vestibular system.

Explanation
The Ear is the body part responsible for hearing and maintaining the body's balance. The ear consists of the outer ear, middle ear, and inner ear.

Explanation
Humans have 20 primary teeth (also known as deciduous or baby teeth). 32 permanent teeth (also known as adult teeth).

Explanation
Incisor teeth are responsible for biting and cutting food into smaller pieces , making it easier to chew and swallow. They are located in the front of the mouth and are designed for cutting and snipping.

Explanation
The Canines are pointed teeth that are adapted for tearing and slashing. They are designed for piercing and tearing flesh , making them ideal for eating meat and other tough foods.

Explanation
Canines , also known as cuspids , are pointed teeth used for ripping and tearing food. They are located on either side of the incisors. It are designed for piercing and tearing flesh, making them ideal for eating meat and other tough foods.

Explanation
The nose has two holes, the nostrils, which take in air from our surroundings and pass it to the lungs through the nasal passages. The nose is responsible for breathing, smelling, and filtering the air we breathe.

Explanation
African elephants have larger ears than Asian elephants. African elephants live in the savannas and need protection from the sun. So their ears are bigger to help them stay cool.

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
The visible part of the ear is called the External Ear  It is also known as the Pinna or Auricle. It is the outer, cartilaginous structure that protrudes from the side of the head and collects sound waves , directing them into the ear canal.

Explanation
The Ear is made up of both internal and external parts. The external part is the visible outer ear. The internal parts include the middle ear and the inner ear. Which contain the cochlea and the vestibular system.

Explanation
The Ear is the body part responsible for hearing and maintaining the body's balance. The ear consists of the outer ear, middle ear, and inner ear.

Explanation
Humans have 20 primary teeth (also known as deciduous or baby teeth). 32 permanent teeth (also known as adult teeth).

Explanation
Incisor teeth are responsible for biting and cutting food into smaller pieces , making it easier to chew and swallow. They are located in the front of the mouth and are designed for cutting and snipping.

Explanation
The Canines are pointed teeth that are adapted for tearing and slashing. They are designed for piercing and tearing flesh , making them ideal for eating meat and other tough foods.

Explanation
Canines , also known as cuspids , are pointed teeth used for ripping and tearing food. They are located on either side of the incisors. It are designed for piercing and tearing flesh, making them ideal for eating meat and other tough foods.

Explanation
The nose has two holes, the nostrils, which take in air from our surroundings and pass it to the lungs through the nasal passages. The nose is responsible for breathing, smelling, and filtering the air we breathe.

Explanation
African elephants have larger ears than Asian elephants. African elephants live in the savannas and need protection from the sun. So their ears are bigger to help them stay cool.

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
The visible part of the ear is called the External Ear  It is also known as the Pinna or Auricle. It is the outer, cartilaginous structure that protrudes from the side of the head and collects sound waves , directing them into the ear canal.

Explanation
The Ear is made up of both internal and external parts. The external part is the visible outer ear. The internal parts include the middle ear and the inner ear. Which contain the cochlea and the vestibular system.

Explanation
The Ear is the body part responsible for hearing and maintaining the body's balance. The ear consists of the outer ear, middle ear, and inner ear.

Explanation
Humans have 20 primary teeth (also known as deciduous or baby teeth). 32 permanent teeth (also known as adult teeth).

Explanation
Incisor teeth are responsible for biting and cutting food into smaller pieces , making it easier to chew and swallow. They are located in the front of the mouth and are designed for cutting and snipping.

Explanation
The Canines are pointed teeth that are adapted for tearing and slashing. They are designed for piercing and tearing flesh , making them ideal for eating meat and other tough foods.

Explanation
Canines , also known as cuspids , are pointed teeth used for ripping and tearing food. They are located on either side of the incisors. It are designed for piercing and tearing flesh, making them ideal for eating meat and other tough foods.

Explanation
The nose has two holes, the nostrils, which take in air from our surroundings and pass it to the lungs through the nasal passages. The nose is responsible for breathing, smelling, and filtering the air we breathe.

Explanation
Digestion begins in the mouth , where food is chewed and mixed with saliva that contains enzymes to break down carbohydrates.  Here's a brief overview of the digestion process: Mouth : Food is chewed and mixed with saliva that contains enzymes to break down carbohydrates. Esophagus : Food is swallowed and passes through the esophagus into the stomach. Stomach : Food is mixed with stomach acid and enzymes to break down proteins and fats. Small Intestine : Nutrients are absorbed into the bloodstream. Large Intestine : Water and electrolytes are absorbed, and waste is eliminated.

Explanation
The stomach's main functions are: Storage : Holds food temporarily Mechanical and chemical breakdown : Mixes and digests food with enzymes and acids Liquification : Converts food into a liquid mixture (chyme) Emptying : Releases chyme into the small intestine for nutrient absorption

Explanation
The stomach is a J shaped sac about one foot in length that lies under the diaphragm on the left of the abdominal cavity. The stomach has three parts : The region where the stomach opens is known as the cardiac stomach. The main body is known as fundus . The posterior portion which opens to the intestine is known as the pyloric stomach.

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
Most headaches are caused by irritation or inflammation of the nerves in the head and neck, rather than the brain itself. This can be due to various factors such as tension, stress, or medical conditions.

Explanation
The adult human brain weighs about 3 pounds (1,300-1,400 g). The adult human brain is about 2% of the total body weight. The average human brain is 140 mm wide. The average human brain is 167 mm long.