The circulatory and

respiratory systems are

__ of each other

in an open circulatory

system.

the

circulatory fluid does not

go out of the vessel.

Exchange occurs through

diffusion via thinner

vessels called capillaries

across the interstitial

fluid.

Diffusion is still used, but

only in exchange of

substances not in its

__

very important animals, as they

require oxygen in the production of higher amount of energy compared to process of energy production without oxygen.

___ of insects has a branched network of tracheal tube which responds to the

problem of decreased surface area in the respiratory structure

The tracheal system opens externally through the side of the insect through a structure called

a ___. Air enters and exit through the __.

gases is directly exchanged through ___ which have extensions that are directly connected to the cells. Air sacs act like aspirator which takes in and push out air out of the body of the insects.

As the respiratory system

of insects are

___ from their

circulatory system

Organisms have different wastes in the form of ___ which they need to excrete. The type of ___s/ vary in toxicity,

energy required for excretion and solubility.

the least energy expensive

among the nitrogenous

wastes.

is

the least soluble and most

expensive but is able to

recycle the most water.

is produced when substances from the blood is filtered in the glomerulus and the Bowman’s capsule. The concentration of

this filtrate is the same compared to the concentration of the interstitial fluid in other parts of the body

The filtrate will move towards the ___.

An ___ is an

internal skeleton.

An ___ is the

external skeleton that

supports and protects an

animal's body.

In a ___ muscles act on a fluid trapped by a cylindrical muscular structure. The contraction of the muscle creates a strong structure which supports movement and strength of a body of an organism, an organ or a particular

body part.

There are different

skeletal systems which

the muscle can pull on,

these are the hydrostatic

skeleton, exoskeleton and

endoskeleton.

___ is the process

of a signal molecule to

bind to receptor

molecules.

are substances which can cause a

reaction to a cell, in Greek it literally means to excite. It is secreted into extracellular fluid such in

blood or lymph and transported to target cells

to elicit a specific response, which can be rapid or slow

___ is a carrier molecule for

amino acids, delivering them to the site of protein

synthesis (specific protein).

cells have a membrane-bound nucleus

which stores the DNA.

cells, which lack a membrane-bound nucleus, have their genetic material located in a region called the nucleoid.