Muscles and Skeleton System
What do humans need in their bodies to be able to stand and sit up?
Bones!
What is the iris? What shape is the iris?
The iris is the colored part of the eye. The iris is donut- shaped.
Let's say Ms. M had the lights off during class, what would happen to your eyes if she turned on the lights?
What are movement nerves?
Movement nerves carry messages from the brain to the muscles to tell our muscles to move !
What pulls on tendons in the body?
Muscles!
Robots and humans are both similar in the way the body functions. Robots have rods and strings, and humans have _______________ and _____________.
bones and tendons
1) Cornea/lens
2) white part
3) pupil/ iris
4) retina
Are ALL animals nocturnal? Why or why not?
No, not all animals are nocturnal. There are some animals that are active during the day but not at night.
What comes first, sensory nerves or movement nerves?
Sensory nerves! Your senses recognize what you hear, taste, touch, see, or smell and tell the brain what is happening. Then, the brain makes a decision to tell the movement nerves what muscles need to move.
Why is the pupil black?
Although the pupil is an opening, it appears to be a black circle because all the light entering it is absorbed by the retina
_______________ and _____________ are a system that give our bodies strength!
muscles and bones
What is the reason why some people have blurry vision?
The eyeball is too far or too close from the cornea lens or retina. It needs to be just right to see clearly.
What do animals have in their eyes that humans do not?
SHINY LAYER (colored part in the back of the retina)
What are sensory nerves? Name the five senses.
The parts of the body that carry signals from the senses to the brain.
1) sight 2) touch 3) smell 4) hearing 5) taste
The retina is a light-sensitive layer lining the back of the eye that contains rods and cones and changes the images formed by the lens to the brain! It sends a message to the brain of the image coming through into the eye!
Why is it so crucial for us to have bones?
Bones provide us with structure! They allow us to sit up and stand. The bones attach to muscles with tendons to help our muscles move. Without a skeleton or bones to attach to, we couldn’t use our muscles.
When it is dark in a room or outside, what do your pupils do and why?
Your pupils need to adjust to the darkness. When they adjust, they dilate (get bigger) in a dark room or when it is dark outside because they want to let as much light in as possible!
What does nocturnal mean?
active at night !
Why did it look like you had a hole in your hand during the "hole in hand" experiment?
What is the fancy word for the shiny layer in the back of the eye of animals?
The tapetum. Eyeshine refers to the reflection of light off the mirror-like membrane, called the tapetum, in the back of the eye. Many animals, including dogs and cats, have a tapetum, while humans do not. The tapetum improves the low-light vision of these animals.
Would our bodies function if we were just made of muscle?
Muscles and bones work together as a system to give our bodies strength. We would just be a blob, and our muscles and other organs wouldn’t move. The Muscle would not be strong enough!
What is the pupil? How does it work?
The pupil functions as an opening that allows light through the lens, which directs it onto the light-sensing cells of the retina at the back of the eye.
Some animals’ pupils are big, and some are small. What is the reason for that?
All the animals with large pupils are active at night (nocturnal). All the animals with small pupils are active during the day. This is the reason why some animals have larger pupils. Larger pupils let more light into the eyes, so nocturnal animals can use the dim light of the Moon to see at night.
Sally's mom is making cookies for the family. Sally did not know what her mom was doing. Sally was upstairs studying and ran downstairs to ask her mom if they were ready! Explain how Sally's brain processed that her mom was making cookies.
The smell of the cookies traveled and entered Sally's nose.
Sensory Nerves sent a message to Sally's brain to say, "Hey, we smell cookies."
Sally's brain made a decision to go downstairs to the kitchen.
The brain sends a message to the nerves of the legs to say, "Hey, legs, move and go downstairs!" to see if the cookies were done.
WHAT CAUSES RED EYES IN FLASH PHOTOS?
The individual's pupils do not have time to adjust to the flash (bright light) so the pupils do not dilate in time! Second, the red eyes are caused by the red blood vessels in the retina that reflect into the camera.