DIFERENTS TYPES OF DIAGRAM

THESE ARE DIFERENTS TYPES OF DIAGRAMS OF THE EYE.

THESE IS A DIAGRAM OF THE EAR.

AND THIS IS THE LAST DIAGRAM , A DIAGRAM OF THE SKIN.

the hormons

DEFINITION :

A hormone is a chemical messenger that carries a signal from one cell (or group of cells) to another via the blood. All multicellular organisms produce hormones .

PITUITARY:

FUNCTION:

The pituitary gland secretes hormones regulating homeostasis, including trophic hormones that stimulate other endocrine glands. It is functionally connected to the hypothalamus by the median eminence.

THYROID:

FUNCTION:

Controls the rate of at which the body's cells work (the metabolic rate) by the production of thyroxine.

PARATHYROID:

FUNCTION:

Regulate calcium levels and have no effect on metabolism.

THYMUS:

FUNCTION:

stimulate the production of certain infection-fighting cells. It is of central importance in the maturation of T cells.

ADRENALS:

FUNCTION:

help maintain the balance of many body functions. Stress, fasting, temperature changes, infections, drugs.

OVARY:

FUNCTION:

nervous system functions

Cerebral Cortex :

Function:

Determines Intelligence
Determines Personality
Interpretation of Sensory Impulses
Motor Function
Planning and Organization
Touch Sensation


the hippocampus :

Function:

plays a part in long term memory and spatial navigation.

Amygdala:

Function:

perform a primary role in the processing and memory of emotional reactions.

Thalamus:

Function:

both process and relay sensory information selectively to various parts of the cerebral cortex.
regulate states of sleep and wakefulness.

Pons:

Function:

Arousal
Assists in Controlling Autonomic Functions
Relays Sensory Information Between the Cerebrum and Cerebellum
Sleep

Cerebellum:

Function:

involved in the coordination of voluntary motor movement, balance and equilibrium and muscle tone.

Els vasos sanguinis :







Els vasos sanguinis són conductes de parets elàstiques per on circula la sang. N'hi ha de tres tipus: artèries, venes i capil·lars.

Les artèries transporten la sang del cor a la resta del cos. Tenen les parets gruixudes.

Les venes transporten la sang de les diferents parts del cos cap al cor. Tenen les parets primes.

Els capil·lars són vasos molt fins que comuniquen les artèries amb les venes. En els capil·lars es produeix l'intercanvi de substàncies entre la sang i les cèl·lules.

El cor i la circulació de la sang:





El cor és un múscul de la mida del puny situat entre els pulmons. Gràcies al seu moviment de contracció i dilatació, fa circular la sang pels vasos sanguinis.

El cor té quatre cavitats: les dues superiors s'anomenen aurícules i les dues inferiors ventricles. La sang entra per les aurícules, passa als ventricles, i aquests l'expulsen amb força cap a l'exterior.

En el cos hi ha dos circuits sanguinis diferents, el pulmonar i el general.

• *En el circuit pulmonar, la sang va del cor als pulmons, i dels pulmons al cor.Als pulmons, la sang expulsa el diòxid de carboni i absorbeix l'oxigen de l'aire.

*En el circuit general, la sang va del cor cap a les diferents parts del cor (cap, extremitats, intestins, ronyons, etc.) i torna de nou al cor.

En el circuit general, la sang proporciona substàncies nutritives i oxigen a les cèl·lules. Les cèl·lules transformen aquestes substàncies en energia, i generen substàncies residuals i diòxid de carboni que aboquen a la sang, la qual s'encarregarà d'expulsar-les del cor.

El funcionament del cor:

The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. This process is called circulation. The main parts of the system are the heart, arteries, capillaries and veins.
As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The aorta is the largest artery in the body. The blood leaving the aorta is full of oxygen. This is important for the cells in the brain and the body to do their work. The oxygen rich blood travels throughout the body in its system of arteries into the smallest arterioles.
On its way back to the heart, the blood travels through a system of veins. As it reaches the lungs, the carbon dioxide (a waste product) is removed from the blood and replace with fresh oxygen that we have inhaled through the lungs.

this is a video that explain the digestion process