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The hind brain controls the heart rate, breathing, blood pressure, sleep, and walking, etc.
The cerebellum is a part of hind brain.
It is maintaining equilibrium, body balance, posture during walking, riding, etc.
Hind brain comprising of the cerebellum, pons, and medulla oblongata.

Hemoglobin is a pigment in the red blood cells which gives the cells their red colour.
Red blood cells help in carrying oxygen throughout the body.
Red blood cells also called erythrocytes.
White blood cells are the ones which help in protecting the body against foreign invaders.

There are four lobes in the human brain.

Frontal lobe
Parietal lobe
Occipital lobe
Temporal lobe

Parietal lobe is located behind the frontal lobe.
Recieve and transmit sensory information from the body and skin.
Also, it is connected to other parts of the brain.
It deals with many sensations including touch, pressure, pain, heat, cold, etc.

Occipital lobe is the smallest of all the lobes.
It is located at the back portion of the brain and below the occipital bone.
The primary visual cortex which is located in the occipital lobe.
It receives and interprets information from the retinas of the eyes.

Metallic character shows the ability of an atom to release the electrons from its outer most shell.
The metallic character decreases across a period from left to right of periodic table.
Therefore Na is the most metallic element, followed by Mg, Be, Si and P.

Hawk, any of various small to medium-sized accipitriform birds, particularly those in the genus Accipiter.
Occasionally these birds of prey attack poultry and smaller birds, but usually they eat small mammals, reptiles, and insects.
Most species nest in trees, but some, such as the marsh hawk, nest on the ground in grassy places.

Hydra is a genus of small, freshwater organisms of the phylum Cnidaria and class Hydrozoa.
They are native to the temperate and tropical regions.
In hydra, preliminary digestion is outside the cells of the endodermis (extracellular), and the secondary phase inside the cells (intracellular).
The trapped food is further digested in the gastrovascular cavity by enzymes secreted by the cells of the cavity.

In amoeba, after the digestion of food in the food vacuole, the food vacuole disappears.
And new food vacuoles will be created everytime.
So it is called as a temporary stomach.

Digestion in amoeba is intracellular taking place within the cell.
The food taken in remains in a food vacuole or gastric vacuole.
It is formed by the cell membrane and small part of the cytoplasm.
The vacuoles are transported deeper into the cells by cytoplasmic movements.
Here they fuse with lysosomes that contain enzymes.

Mid brain is a small central part of the brainstem.
It is developing from the middle of the primitive or embryonic brain.
It connects the fore brain and hind brain.
It is a bridge to transmit signals.
The functions are vision, hearing , temperature regulation, and alertness, etc.

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