Maharashtra Board Class 4 EVS A look inside the body solutions
if you are looking for Maharashtra Board Class 4 EVS A look inside the body solutions then you are at the right place. Here we are providing solutions as well as additional QA / Important Notes.
Answer the following questions.
- What is meant by ‘internal organ”?
‘Internal organ’ refers to an organ that is located inside the body, performing specific functions necessary for bodily processes.
- Name the two cavities in the abdomen.
The two cavities in the abdomen are the abdominal cavity and the pelvic cavity.
- Which important organs are situated in the ribcage in the thoracic cavity?
The heart and lungs are important organs situated in the ribcage in the thoracic cavity.
- Why does the chest swell when we breathe in ?
The chest swells when we breathe in because the lungs expand to take in air, causing the chest cavity to enlarge.
- Why is the brain situated in the casing of the skull ?
The brain is situated in the casing of the skull for protection. The skull provides a safe enclosure to protect the delicate brain tissue from external injuries.
Fill in the blanks.
- The internal organs that help digest food are located in the………. [abdomen]
- We have………….lungs.[two]
- Every…………of the heart is called a heartbeat.[contraction]
- We become……of all our emotions in the brain.[aware]
- The structure of the human body is very………[complex]
True or false?
- The oesophagus is in the thoracic cavity.[True]
- The heart is a little bigger than our fist.[True]
- The food in the mouth forms a moist lump.[True]
- In the brain, we interpret the information collected by the sensory organs.[True]
Give reasons why.
- The structure of the body is such that all internal organs remain secure in their places.
The structure of the body includes cavities such as the thoracic and abdominal cavities, which provide secure spaces for internal organs to reside. Additionally, organs are often supported and anchored by surrounding tissues and structures, ensuring they remain in their designated places even during movement or physical activity.
- Blood must be kept flowing in the blood vessels throughout the body.
Blood must be kept flowing in the blood vessels throughout the body to ensure the delivery of oxygen, nutrients, and hormones to cells, as well as the removal of waste products such as carbon dioxide. Continuous blood circulation is essential for maintaining cellular function and overall bodily homeostasis.
- The brain has to be kept completely safe.
The brain, being the control center of the body responsible for coordinating various bodily functions and processes, must be kept completely safe to ensure proper functioning. The skull, a rigid protective casing, encloses and shields the delicate brain tissue from external trauma and injury, safeguarding its integrity and functionality.
(F) Match the following:
‘A’ Group ‘B’ Group
Blood supply Alimentary canal
Breathing Heart
Carrying food to the stomach Brain
Controlling movements Lungs
Matching:
| ‘A’ Group | ‘B’ Group |
| Blood supply | Heart |
| Breathing | Lungs |
| Carrying food to the stomach | Alimentary canal |
| Controlling movements | Brain |
Q: Why does the chest expand when we breathe in?
A: The chest expands when we breathe in because the lungs expand to take in air, causing the chest cavity to enlarge.
Q: What causes the throbbing sensation when feeling the pulse?
A: The throbbing sensation felt when feeling the pulse is caused by the contraction and relaxation of the heart, which pushes blood through the blood vessels.