types:

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costal groove

groove between the ribs where the nerves and blood vessels are

fissure

(anatomy) a long narrow slit or groove that divides an organ into lobes

sulcus

(anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain

hilum, hilus

(anatomy) a depression or fissure where vessels or nerves or ducts enter a bodily organ

type of:

body part

any part of an organism such as an organ or extremity