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2. TONGUE
• The tongue is a muscular organ in the mouth. The tongue is covered
with moist, pink tissue called mucosa. Tiny bumps called papillae give
the tongue its rough texture.
• Tongue has three types of taste buds
• Sour Buds
• Sweet Buds
• Bitter Buds
3. BRAIN
• The brain is one of the largest and most complex organs in the human
body. It is made up of more than 100 billion nerves that communicate
in trillions of connections called synapses. ... The brain stem is
between the spinal cord and the rest of the brain. Basic functions like
breathing and sleep are controlled here.
5. STOMACH
• The stomach is a muscular organ located on the left side of the upper
abdomen. ... As food reaches the end of the esophagus, it enters the
stomach through a muscular valve called the lower esophageal
sphincter. The stomach secretes acid and enzymes that digest food.
Ridges of muscle tissue called rugae line the stomach.