Showing posts with label Human Body. Show all posts
Showing posts with label Human Body. Show all posts

Tuesday, April 11, 2017

Hypodermis


We just learned about the Dermis.

Another part of the skin is the Hypodermis, also called the Subcutaneous tissue.
This is the skin below the Dermis, which is below the Epidermis.

The body mostly has fat cells in the hypodermis, but it also has white blood cells and blood vessels.
There is also something called deep fascia or connective tissue that connects your muscles to your skin.

(from: wikipedia - subcutaneous tissue)


Kid Facts - Blast from the past: Frontal Lobe

Tuesday, April 4, 2017

Dermis


We just learned about the Epidermis.

Another part of the skin or integumentary system is the Dermis, also known as the Corium.

The Dermis is right below the Epidermis, and it helps give padding to the body underneath the skin.
It also is where the hair starts in things called follicles, and has many things called glands that do things like create sweat or other things your body makes.
The blood vessels we learned about in the circulatory system are also in the dermis.


(from: wikipedia - dermis)


Kid Facts - Blast from the past: Cerebrum

Tuesday, March 28, 2017

Epidermis


We just learned about the Skin.

Skin is made up of a lot of layers. The top part on the outside is called the Epidermis.
This is the dry part of the skin that helps protect things from getting inside of your body.


(from: wikipedia - epidermis)


Kid Facts - Blast from the past: Brain

Tuesday, March 21, 2017

Skin


Let's keep learning about the Integumentary System.

The largest part of this system is the skin.

It is the largest organ in the human body, and it makes up about 15 percent of a person's body weight.
That means if a person weighs 100 pounds, their skin weighs 15 pounds!

Human skin has a few layers that help protect the inside of the body from things getting in, and it can heal when it is cut.

(from: wikipedia - epidermis)


Kid Facts - Blast from the past: Peripheral Nervous System

Tuesday, March 14, 2017

Integumentary System


We've learned a lot about the Nervous System.

Another part of the body is the Integumentary System.

This is the part of the body that is your skin, hair and nails.


(from: wikipedia - integumentary system)


Kid Facts - Blast from the past: Central Nervous System

Tuesday, March 7, 2017

Axon Terminal


We just learned about the Node of Ranvier.

Another part of the neuron is the Axon Terminal.

The Axon Terminal is the branch that goes out after the end of the long Axon, and it uses electricity and chemicals in the body to talk to other neurons.


(from: wikipedia - axon terminal)


Kid Facts - Blast from the past: Nervous System

Tuesday, February 28, 2017

Node of Ranvier


We just learned about the Schwann Cell.

Another part of the neuron is the Node of Ranvier.

We know that the myelin sheaths are covering the axons.
There are gaps in the myelin sheaths, and those gaps are called the nodes of ranvier.

These gaps helps the neuron send its information faster along the axon.


(from: wikipedia - node of ranvier)


Kid Facts - Blast from the past: Heart Wall - Pericardium

Tuesday, February 21, 2017

Schwann Cell


We just learned about the Myelin Sheath on a neuron.

Another part of the neuron is the Schwann Cell.

These are cells that help surround neurons to protect them and keep them in place.


(from: wikipedia - schwann cell)


Kid Facts - Blast from the past: Heart Wall - Epicardium

Tuesday, February 14, 2017

Myelin Sheath


We just learned about the Axon.

Another part of the neuron in the nervous system is the Myelin Sheath.

This is a fatty covering over the axon, so it can protect the messages getting sent over from the soma.
It's kind of like the rubber covering on an electrical cord, keeping all the electricity in and protecting it from escaping.


(from: wikipedia - myelin)


Kid Facts - Blast from the past: Myocardium

Tuesday, February 7, 2017

Axon


We just learned about the Dendrite.

Another part of the neuron is the Axon.

The axon takes messages from the main body of the neuron and sends them off to other neurons.
It's like the long highway that the messages go on to leave the neuron.


(from: wikipedia - axon)


Kid Facts - Blast from the past: Heart Wall - Endocardium

Tuesday, January 31, 2017

Dendrite


We just learned about the Nucleus.

Another part of the neuron in the nervous system is the Dendrite.

The dendrites are the part of the neuron that reach out like tree branches or fingers.
When the neuron wants to send a message to another neuron, it sends it out over the dendrites, and the other neuron touches dendrites and gets the message.


(from: wikipedia - dendrite)


Kid Facts - Blast from the past: Pulmonary Valve

Tuesday, January 24, 2017

Nucleus


We just learned about the Soma.

Another part of the neuron is the Nucleus.

The nucleus is in the middle of the Soma, and is the part of the neuron that is in control.
It is like the brain that tells the rest of the neuron what to do.


(from: wikipedia - soma (biology))


Kid Facts - Blast from the past: Aortic Valve

Tuesday, January 17, 2017

Soma


We just learned about the Neuron in the nervous system that sends messages in the body.

One part of the neuron is called the Soma.

The soma is the big part of one end of the neuron that has smaller parts inside of it.
It comes from the Greek word meaning "body", so the soma is the main body of the neuron.


(from: wikipedia - soma (biology))


Kid Facts - Blast from the past: Mitral Valve

Tuesday, January 10, 2017

Neuron


We just learned about the Enteric Nervous System.

All of the parts of the nervous system are made up of smaller things called neurons.

Neurons are like tiny little computers in the body that send and receive messages to other neurons all over the body.


(from: wikipedia - neuron)


Kid Facts - Blast from the past: Tricuspid Valve

Tuesday, January 3, 2017

Enteric Nervous System


We just learned about the Parasympathetic Nervous System.

Another part of the Autonomic Nervous System in the Peripheral Nervous System is the Enteric Nervous System.

This part of the nervous system is mostly in control of the body's digestion.


(from: wikipedia - enteric nervous system)


Kid Facts - Blast from the past: Heart Valves

Tuesday, December 27, 2016

Parasympathetic Nervous System


We just learned about the Sympathetic Nervous System.

Another part of the Autonomic Nervous System is the Parasympathetic Nervous System, sometimes just called the PSNS.

Remember the Sympathetic Nervous System gives us the "fight or flight" feelings.

The PSNS gives us what we call the "rest-and-digest" feelings.
These are more for when you are sitting at rest, eating or just relaxing.


(from: wikipedia - parasympathetic nervous system)


Kid Facts - Blast from the past: Heart - Blood Flow

Tuesday, December 20, 2016

Sympathetic Nervous System


We just learned about the Autonomic Nervous System, which is part of the Peripheral Nervous System.

One part of the Autonomic Nervous System is the Sympathetic Nervous System.

This part of our nervous system gives us what we call the fight-or-flight feelings.
That means when something happens that scares you or hurts you, this helps make your decision for whether you run away or whether you fight back.


(from: wikipedia - sympathetic nervous system)


Kid Facts - Blast from the past: Pulmonary Artery

Tuesday, December 13, 2016

Autonomic nervous system


Remember we learned that the Nervous System is split up into two parts, the Central Nervous System (CNS) and the Peripheral Nervous System (PNS).
And that part of the Peripheral Nervous System is the Somatic Nervous System.

Another part of the Peripheral Nervous System is the Autonomic Nervous System.

This part of your nervous system controls your internal organs, like your heart, stomach or liver.


(from: wikipedia - autonomic nervous system)


Kid Facts - Blast from the past: Right Ventricle

Tuesday, December 6, 2016

Brachial Plexus


We just learned about the Coccygeal Plexus.

Another part of the nervous system is the Brachial Plexus.

These are the nerves coming from the lower cervical nerves (C5, C6, C7, C8), and the first thoracic nerve (T1).

It controls feeling and movement in the chest, shoulder, arm and hand.


(from: wikipedia - brachial plexus)


Kid Facts - Blast from the past: Right Atrium

Tuesday, November 29, 2016

Coccygeal plexus


We just learned about the Sacral Plexus.

The next nerve at the bottom of your spinal column is the Coccygeal Plexus.

This nerve helps tell your body when it is time to go to the bathroom.


(from: wikipedia - coccygeal plexus)


Kid Facts - Blast from the past: Jugulary Vein