Showing posts with label Integumentary System. Show all posts
Showing posts with label Integumentary System. Show all posts

Tuesday, May 16, 2017

Hair - Plexus


We just learned about the Hair Growth.

Another part of the human hair is the Plexus.

These are very small nerves that are wrapped around the bottom of the hair follicle, that sense when the hair is moved.
They are very sensitive, which is how your body can feel a light breeze through the hair on your skin.


(from: wikipedia - hair plexus)


Kid Facts - Blast from the past: Hypothalamus

Tuesday, May 9, 2017

Hair Growth


We just learned about the Hair Follicle.

Human hair doesn't always grow at the same speed.
Sometimes it is growing a lot, sometimes it is slowing down, and sometimes it stops growing.

We know that the hair on our head grows longer than the hair on our eyebrows or eyelashes.
Each part of the body has different rules for how long the hair should grow, and when it should stop.

The time for growing of hair is called the anagen phase.
catagen is when the hair growth is slowing down.
telogen is when the hair has stopped growing because it is long enough.

The hair for your eyebrows grows for about 4 months and then stops, but the hair on a human head will keep growing at a normal speed for about 2-7 years!
Human hair usually grows about 6 inches every year, so after 7 years your hair would be four and a half feet long!


(from: wikipedia - human hair growth)


Kid Facts - Blast from the past: Thalamus

Tuesday, May 2, 2017

Hair - Follicle


We just learned a little about human Hair.

One part of the hair is the hair follicle.

This is the part of the human skin that makes the hair that then grows up out of the skin.


(from: wikipedia - hair follicle)


Kid Facts - Blast from the past: Occipital Lobe

Tuesday, April 25, 2017

Hair


We just learned about the Adnexa, things that stick out of your skin.

Part of the Adnexa is Hair.

Even though hair just looks like small strings to us, there are a lot of parts to hair like the root, the follicle, shaft, cuticle, cortex and medulla.
Hair can be curly or straight, and can be many colors like brown, black, blond, red or even white.

It grows on every part of the skin except places like the palms, bottoms of the feet, and lips.



(from: wikipedia - hair)


Kid Facts - Blast from the past: Temporal Lobe

Tuesday, April 18, 2017

Adnexa


We just learned about the Hypodermis.

Another part of the integumentary system is the Adnexa, also called the Skin appendages.

These are the things that come out from your skin, but aren't skin themselves.
Like hair, nails, or where your sweat comes from called sweat glands.


(from: wikipedia - hair)


Kid Facts - Blast from the past: Parietal Lobe

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