What is the name of the body part at number 3?  

Which part of the heart distributes oxygenated blood to the body? 

T cells are lymphocytes that secrete antibodies and B cells lymphocytes that directly attack antigens

The skeletal system is divided into two units: Axial skeleton composed of ribs, spine, and skull and Appendicular skeleton composed of hip, shoulder, and limbs. 

The following is part of what type of tissue?

Protein hormones cannot cross cell membranes and bind to surface receptor were they bind to surface receptor, a signal transduction to produce a chainreaction relays signal from outside. Were as steroid hormones are fat-soluble hormones that can cross cell membranes and bind to receptors inside target cell to turn specific genes on or off

What is the mane of the body part at number 6?  

Which chamber of the heart receives the deoxygenated blood from the systemic system first?

  In this diagram what is at number 1.

The adrenal glands are located deep inside the brain and secrete Growth hormone, follicle- stimulating hormone (FSH), and luteinizing hormone (LH)