Question

explain human brain ....?​

Answer 1

$\huge{\mathfrak{\underline{\underline{Answer:-}}}}$

The Brain is a part of the central nervous system which helps us to think and coordinate various functions of our body. Brain consists of three parts:

$\bf{\red{\underline{\underline{1.\:Fore-brain:-}}}}$ Fore-brain further consists of:

$\star{\mathtt{\blue{\underline{Cerebrum:-}}}}$ The Cerebrum constitutes the major portion of fore brain and is responsible for though and action of the body.

$\star{\mathtt{\blue{\underline{Hypothalamus:-}}}}$ Hypothalamus controls the pituitary gland and is responsible for the realization of thirst and hunger.

$\star{\mathtt{\blue{\underline{Thalamus:-}}}}$ Thalamus regulates the consciousness and sleep of the individual.

$\bf{\red{\underline{\underline{2.\:Mid\:Brain:-}}}}$ Mid brain consists of tectum and tegmentum. They control the auditory and visual system of the individual. The movement of eyes is also controlled by mid brain.

$\bf{\red{\underline{\underline{3.\:Hind-brain:-}}}}$ Hind brain consists of:

$\star{\mathtt{\blue{\underline{Cerebellum:-}}}}$ Cerebellum coordinate the movement, posture and balance of the individual.

$\star{\mathtt{\blue{\underline{Pons:-}}}}$ Pons regulate the arousal and sleep of the individual and also helps in passing the sensory Information between cerebrum and Cerebellum.

$\star{\mathtt{\blue{\underline{Medulla:-}}}}$ Medulla controls the salivation and vomiting.

Answer 2

$\huge\bf{\pink{\mid{\overline{\underline{your\: answer}}}\mid}}$

$\huge{\bold{\sf{\underline{\underline{HUMAN\:BRAIN}}}}}$

★ Brain is the central information processing organ of our body, and act as the " command and control system".

★ It develops from neural tube in intrauterine life (I.U.L.) . anterior part of neural tube develops into Brain.

$\rm{\underline{Position-}}$ In skull surrounded by,

✏ 1 frontal bone.

✏ 2 parietal bone.

✏ 2 temporal bone.

✏ 1 Ossciepetal bone.

✏ 1 spehnoid.

✏ 1 Ethmoid.

$\rm{\underline{weight-}}$

Male - 1400gm

Female - 1250gm

$\rm{\underline{Development\:time-}}$

Approx 70-80% in 2 years.

100% in 6 years.

★ Brain is covered by three membranes of connective tissue termed as Menix.

$\star{\mathtt{\blue{\underline{(1)\:Durameter-}}}}$ This is the first and outer most memberane which is thick, very strong and non-elastic. it is made up of Colleagen fibre.

it is double layer and both layer are fused with each other and both layers are fused with each others. these are separated from one other by cranial venous sinus (C.V.S).

$\star{\mathtt{\blue{\underline{Arachnoid-}}}}$

it is very thin middle layer and delicate membrane. it is found only in mammals. in front of cranial venous sinus. it becomes folded, these folds are called Arachnoid villi.

$\star{\mathtt{\blue{\underline{Piameter-}}}}$ It is the innermost thin and transparent membrane. piameter merges into suicide of brain and densely adhare it.

$\large{\underline{\underline{\mathbf{Human \: brain\: is\: divided \: into \: three\: parts}}}}$

1. $\star{\mathtt{\pink{\underline{Forebrain-}}}}$

✒most developed and 2/3 part of brain.

✒ crebrum consist of two crebral hemisphere. on the dorsal surface.

✒ each cerebral hemisphere consist of 4 lobes - anterior, middle, posterior and lateral.

✒ very important part of brain called hypothalamus lies at the base of forebrain.

2. $\star{\mathtt{\pink{\underline{Mid brain-}}}}$

✒ small and contracted part of brain.

✒ the mid brain is located between thalamus /hypothalamus of the forebarain and pons of the hind brain.

✒ in anterior part - 2 longitudinal fibres.

in posterior part - 4 optic lobes

✒ it control the muscle of limbs.

3. $\star{\mathtt{\pink{\underline{hind\:brain-}}}}$

✒ it regulates the breathing reaction.

✒ it is cylindrical in shape.

✒ it control respiration and cardiovascular reflexes.

✒ received impulses from different voluntary muscle.

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