Explanation

• In the smooth glistening internal layer of the heart in which blood flow is called the Endocardium
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• The inner layer of the Heart wall is called Endocardium.
• The endocardium is a thin, smooth tissue that makes up the lining of the chambers and valves of the heart.
• The innermost layer of the heart's walls, it serves as a barrier between cardiac muscles and the bloodstream and contains necessary blood vessels
  

Explanation

• Pulmonary veins are the only veins that transport oxygenated blood to the heart.
• Specifically from the lungs to the left atrium.

Explanation

• The tongue is a muscular organ, and its rough structure is due to the presence of papillae.
• It small projections that house taste buds and contain taste receptors.

Explanation

• The iris is the colored part of the eye that surrounds the pupil.
• It controls the amount of light entering the eye by adjusting the size of the pupil.

Explanation

• The retina is the innermost layer of the eye that senses light and sends visual signals to the brain.
• It's is also known as "screen of the eye".
• Because it is where the light rays are finally focused and interpreted as visual information.

Explanation

• When the rhythmic action of the digestive tract (peristalsis) speeds up.
• It can lead to diarrhea.

Explanation

• Smoking is the leading cause of lung cancer.
• It is responsible for about 80-90% of all lung cancer deaths.

Explanation

• Human tissue contains about 20% water in Nerve Cells
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• Water is the most abundant molecule in cells, accounting for 70% or more of total cell mass
  
• Brain cells contain 85% water.
• In adult men, about 60% of their bodies are water

The organs in the human body with the highest percentages of water are the brain (80-85%),

• kidneys (80-85%),
• heart (75-80%),
• lungs (75-80%),
• liver (70-75%),
• muscles (70-75%),
• and skin (70-75%).

Explanation

• A dark blue tympanic membrane is seen in Tympanic Membrane
• A dark blue tympanic membrane is related to the Ear.
  

Explanation

Protists are a group of all the eukaryotes that are not fungi, animals, or plants