ENDOCRINE SYSTEM

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Your endocrine system includes all the glands in your body that make hormones. These chemical messengers play a key role in making sure your body works the way it should.
If your endocrine system isn't healthy, you might have problems developing during puberty, getting pregnant, or managing stress. You also might gain weight easily, have weak bones, or lack energy because too much sugar stays in your blood instead of moving into your cells where it's needed for energy.

Key Parts

endocrine system illustrationMany different glands make up the endocrine system. The hypothalamus, pituitary gland, and pineal gland are in your brain. The thyroid and parathyroid glands are in your neck. The adrenals are on top of your kidneys, and the pancreas is behind your stomach. Your ovaries (if you're a woman) or testes (if you're a man) are in your pelvic region. In the following posts we will talk about each gland and the hormones it secretes.


 Hormones
Hormones are the body’s chemical messengers and are part of the endocrine system
which travel through the bloodstream to tissues and organs, and control most of our body’s major systems.
Some important aspects that we should take into account are:
  • Hormones affect our body’s functions, from growth and sexual development and mood to how well we sleep, how we manage stress and how our body breaks down food.
  • When they are in proper balance, hormones help the body thrive. But sometimes hormone levels are too high or too low. Hormone imbalances can occur any time regardless of one’s age and cause serious health problems requiring ongoing medical management.

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HUMAN EMBRYOGENESIS (STEP 1-4)

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Embryogenesis, the first eight weeks of development after fertilization, is an incredibly complicated process. It’s amazing that in eight weeks we’re transforming from a single cell to an organism with a multi-level body plan. The circulatory, excretory, and neurologic systems all begin to develop during this stage. Luckily, like with many complex biological concepts, fertilization can be broken down into smaller, simpler ideas. The big idea of embryogenesis is going from a single cell to a ball of cells to a set of tubes.  Starting from the very beginning Step 1 : a  zygote  is the single cell formed when an egg and a sperm cell fuse; the fusion is known as fertilization Step 2 : the first 12-to 24-hours after a zygote is formed are spent in  cleavage  – very rapid cell division The zygote’s first priority is dividing to make lots of new cells, so it’s first few days are spent in rapid mitotic division. With each round of division, it doubles in cell number. This divisio
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CENTRAL NERVOUS SYSTEM

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The Central Nervous System (CNS) The central nervous system is divided into two major parts: the brain and the spinal cord.   Firstly,we are going to talk about the brain. Parts of the Human Brain and their Subdivisions Human encephalon resembles, in structure and function, with that of the other vertebrates. The scientists reveal that parts of the human brain are Forebrain, Midbrain & Hindbrain and the related structures that collectively act as a single highly specialized unit. These parts work in coordination and perform  different functions of brain . More specifically, it is divided into five major regions, namely, telencephalon, diencephalon or inter-brain, myelencephalon (hindbrain/medulla oblongata), metencephalon and mesencephalon (midbrain). Here follows a precise but comprehensive description of each of the above given divisions. Telencephalon/Cerebrum—Anterior Part Of Forebrain Further composed of cerebral cortex, limbic and basal ganglia, it is th
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SKELETAL SYSTEM (PHYSIOLOGY)

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Support and Protection The skeletal system’s primary function is to form a solid framework that supports and protects the body’s organs and anchors the skeletal muscles. The bones of the axial skeleton act as a hard shell to protect the internal organs— from damage caused by external forces. The bones of the appendicular skeleton provide support and flexibility at the joints and anchor the muscles that move the limbs. Movement The bones of the skeletal system act as attachment points for the skeletal muscles of the body. Almost every skeletal muscle works by pulling two or more bones either closer together or further apart. Joints act as pivot points for the movement of the bones.  Hematopoiesis Red bone marrow produces red and white blood cells in a process known as hematopoiesis. Red bone marrow is found in the hollow space inside of bones known as the   medullary cavity .  The amount of red bone marrow drops off at the end of puberty, replaced by yellow bone marrow.
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