systems in other species 🦈🐞

Sponges have no digestive, respiratory, excretory or circulatory systems. What do they do instead to get nutrients and get rid of waste?

They have pores and channels all through their bodies, and every cell is directly in contact with seawater close by.

What do cells in our bodies rely on more specifically What systems?

Our cells rely on the circulatory system to bring nutrients and remove waste

Does the circulatory system hook up to?

The digestive respiratory and excretory systems

True or false? acting together, your respiratory, digestive, excretory, and circulatory systems, deliver oxygen and nutrients to each one of the trillions of cells in your body and remove waste from all those cells?

True

Why do sponges not need body systems?

All the body cells are close enough to seawater to get oxygen and nutrients and dispose of waste directly

What are sharks main respiratory organs?

Their gills

What Are sharks gills packed with that are used for oxygen to diffuse into and carbon dioxide diffuse out of?

Blood capillaries

Where does gas exchange occur on sharks?

On the surface of millions of tiny flat lamella

Why must sharks have water flowing over their gills continuously?

Because gas exchange wouldn’t occur

Determine whether this comparison is true? Human respiratory systems take in air through the nostrils and mouth and expelled it back out the same way. Sharks are the same except for them it is water moving in and out?

False

Recall, which of the following descriptions, best describes how oxygen dissolved in seawater is extracted by sharks?

It diffuses into capillaries inside the lamellae in their gills.

Why do sharks need so many lamellas?

For greater surface area

Recall how blood flows in a shark?

Sharks blood flows around a single loop unlike the two loops and human circulatory systems. This means that sharks hearts only need two chambers.

What is an advantage of the human circulatory system over the sharks?

One advantage over sharks is the human circulatory system has two loops. meaning that oxygen reaches the muscles and organs quickly.

Why do humans need a more complex system?

We need a more complex system because we are mammals and use lots of energy.

How do grasshoppers breathe in and out?

They breathe by 10 pairs of holes along the sides of their bodies called spiracles that connect to a network of tubes in their bodies called tracheas.

I don’t grasshoppers need a circulatory system?

Because the gases are exchanged directly with cells through the tracheas. Meaning it moves around and open circulatory system this means that isn’t always contained in blood vessels.

Do humans have many blood vessels, but just one heart grasshoppers have more than one heart, but only one blood vessel?

Yes, this is true

Grasshoppers have an open circulatory system recall what this means

This means their blood is not always contained in blood vessels.

Grasshopper blood carries very little oxygen or carbon dioxide. Identify how grasshoppers can survive with blood like this.

Their trachea extends throughout their body.

Describe the journey such nutrients would take to get to the grasshopper’s brain

The journey nutrients would take to get to the brain is that it goes through the walls of the digestive tract into the body cavity and is transported through the blood vessel to the brain.