The combining form that means atrium is "atri/o." This prefix is used in medical terminology to refer to the atrial chambers of the heart, which are the upper chambers that receive blood. For example, "atrial" pertains to anything related to the atrium.
The combining form for the upper chamber of the heart is "atri/o".
The combining form hist/o means
Xeno- is the combining form meaning strange or other.
Combining form derm/o means: skin
The combining form that means "nail" is onych/o.
A hump is not a medical term, so I can't give you the correct combining form.
Combining form for shape
The prefix hepta- means seven.
The combining form that means hidden is "crypt-" as in "cryptic" or "cryptology."
The medical terminology combining form for "rapid" is "tachy-." For instance, tachycardia is abnormally rapid heartrate.
The combining word is sphygum
Spleno means spleen in medical terminology.Spleno- is already the combining form. It is the combining form for the spleen.