The spine.
The common name for the part of the skeleton that supports your body when you sit upright is the spine. It is made up of individual bones called vertebrae that provide structure and support for the body.
The arm supports the body tube.
The spine.
Lungs
The skeleton.
The arm or the frame of the compound microscope supports the body tube.
the brain
The ischial tuberosity is the part of the ischium that supports the body when seated. It is commonly referred to as the "sitting bone" and bears the weight of the body during activities such as sitting and cycling.
The femur is a part of you articular skeleton, and typically supports the weight of your upper body.
neck
Water supports a jellyfish's body.
it supports the upper part of the microscope where the eyepiece, draw tube , body tube and the objectives is placed .