Question

Draw a well labelled diagram of Brain and explain it's parts

Answer 1

Hello friend...

The brain is made of three main parts: the forebrain, midbrain, and hindbrain. The forebrain consists of the cerebrum, thalamus, and hypothalamus (part of the limbic system). The midbrain consists of the tectum and tegmentum.

Hope it helped u...☺️☺️

Answer 2

$\huge \bold{ANSWER}$

◼$\underline \bold{THE BRAIN}$

▶In proportion to the size of human brain is the largest among all animals.

▶It is very delicate organ protected inside the brain box cranium of the skull.

▶It weighs about 1.35 kg and constitute about 2 % of the total body weigth.

▶It is 80% water and consumes 25% of total oxygen.

◼$\underline \bold{PARTS}$

The three main parts of brain visible externally are

1)-Cerebrum

2)-Cerebellum

3)-Medulla oblongata.

1◼$\bold{CEREBRUM}$

▶It is the largest portion of brain.

▶It is divided into two halves called cerbral hemispheres. Their outer surface is highly convoluted with ridges called gyri and grooves called sulci.

▶The outer portion of cerebtin contains cell body of neuron and is grayish in colour, is called gray matter .

▶The inner portion of the cerebrum consists of "white matter" which mainly contain axons of neurons.

▶Copus collasum is a sheet of fibres v

connecting two cerebral hemisphere. Its function is to transfer information from

one hemisphere to other .

FUNCTION:---

The cerebrum is seat of intelligence, consciousness and will power, It controls all voluntary actions.

2◼$\bold{CEREBELLUM}$

▶The cerebellum is a much smaller area of the brain located just at the base and under the large cerebrum.

▶This also has an outer cortex made of gray matter.

▶It has white matter which in a median section appears like branchinh tree.

FUNCTIONS:--

The main function of the cerebellum is to maintain body balance of the body and coordinate muscular act.

3◼$\bold{MEDULLA \: OBLONGATA}$

▶The medulla oblongata is the lowest portion of the brain located at the base of the skull.

▶It is roughly a triangular and is continued behind the spinal cord.

▶Its upper part is pons, located at the centre of the brain below crebellum.

It carries impulses from one hemisphere of cerebellum to other.

FUNCTION:--

Its function is to control the activities of internal organs.

Example :-

Peristalsis movement,breathing etc.

⚫$\bold{REGIONS}$
The brain have Three primary regions:-

1)-Forebrain

2)-Midbrain

3)-Hindbrain


▶The forebrain contains cerebrum and diencephalon which have

✳Thalamus -relays pain and pressure impulses to cerebrum.

✳Hypothalamus -controls body temperature and pituitary.

▶Midbrain is a small tubular part which controls reflexes involving ear and eyes.

▶Hindbrain consists of cerebellum , pons and medulla oblongata.