What is the body system that filters waste and removes solid waste from the body?
a) circulatory system
b) excretory system
c) skeletal system

B) Excretory system because the skeletal system is your bones and your circulatory system is your heart and lungs and etc.

This body system is called (B. Excretory system) 
It filters out your body from toxins and takes away waste from cells in your body. 

The circulatory system is consisting of the heart, blood, and lungs.

While the Skeletal system is more about your bone structure. 

Answer is is darkly don’t but i want the points

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic