Imagen libre de derechos The structure of DNA.

Imagen libre de derechos An image of a cigarette with the word 'cancer' printed on it.

Imagen libre de derechos An abstract depiction of drug absorption into the blood stream. Numerous pills intermingling with re

Imagen libre de derechos An anterolateral view (right side) of the blood supply of the trunk relative to the skeleton. The su

Imagen libre de derechos The blood supply of the adrenal cortex.

Imagen libre de derechos The needle of a syringe with drops of blood below it.

Imagen libre de derechos A lateral view (left side) of the brain. The frontal, parietal, occipital and temporal lobes are hig

Imagen libre de derechos The internal structure of muscle

Imagen libre de derechos An example of a capillary bed.

Imagen libre de derechos The muscles involved in barbell deadlifts. The agonist (active) muscles of this exercise are highlig

Imagen libre de derechos The muscles involved in cable front/lats pull downs. The stabilising muscles are highlighted.

Imagen libre de derechos An image of a (skeletal) hand gesture.

Imagen libre de derechos An anterior view of the muscles of the chest relative to the skeleton. The pectoralis major is high

Imagen libre de derechos A stylised scanning electron microscopic image of a generic enveloped virus. Examples of such viruse

Imagen libre de derechos A medial view of the right knee with an artificial metal replacement.

Imagen libre de derechos Stylized image showing the acupuncture meridians on a male torso.

Imagen libre de derechos A lateral view (right side) of a skeleton in the running position.

Imagen libre de derechos A high power view of the rods and cones of retina in the eye.

Imagen libre de derechos An image of a drop of blood. A DNA helix is reflected on its surface.

Imagen libre de derechos A posterolateral view (right side) of the brain and nerve supply of the head relative to the skull.

Imagen libre de derechos The muscles involved in the dumbbell kickback exercise. The agonist (active) and stabiliser muscles

Imagen libre de derechos The muscles involved in setanta push up exercise. The agonist (active) muscles and the stabilising m

Imagen libre de derechos A lateral view (right side) of the brain and the nerves of the head and neck. (The arteries of the b

Imagen libre de derechos Bacterial infection. A scanning electron microscopic image of bacteria (rod-shaped) travelling with

Imagen libre de derechos An inferior anterior view of the brain and the nerves of the head and face.

Imagen libre de derechos An anterior view of the female reproductive organs relative to the pelvis. The bladder is also inclu

Imagen libre de derechos A midsagittal section of the brain and its position relative to the skull. The surface anatomy of th

Imagen libre de derechos Lymphoid cells are derived from stem cells of the lymphoid lineage.

Imagen libre de derechos A posterolateral view (left side) of the limbic system (in isolation).

Imagen libre de derechos An anterior view of the muscles of the thighs relative to the skeleton. The sartorius muscles are hi

Imagen libre de derechos The muscles involved in body row exercise. The agonist (active) and stabiliser muscles are highlight

Imagen libre de derechos A lateral view (right side) of the blood vessels of the brain and eyes relative to the skull. The in

Imagen libre de derechos Hip replacement is a medical procedure in which the hip joint is replaced by a synthetic implant. An

Imagen libre de derechos An image of a number of pills with the word 'Vitality' embossed on them.

Imagen libre de derechos A scanning electron microscopic image of generic cells.

Imagen libre de derechos An anterior view of the digestive system. The surface anatomy of the female body is semi-transparent

Imagen libre de derechos An anterolateral view (left side) of the brain relative to the muscles and nerves of the head and ne

Imagen libre de derechos A sectioned penis showing its internal organisation. The veins and arteries are highlighted in blue

Imagen libre de derechos The structure of DNA.

Imagen libre de derechos An anterior view of the heart relative to female body. The surface anatomy of the body is semi-trans

Imagen libre de derechos The muscles involved in barbell deadlift exercises. The stabilising muscles of this exercise are hig

Imagen libre de derechos The muscles involved in the lateral raise exercise. The agonist (active) muscles and the stabilising

Imagen libre de derechos Stylized image showing the acupuncture meridians on a male torso.

Imagen libre de derechos A superior anterior view of the female reproductive organs relative to the skeleton. The bladder is

Imagen libre de derechos An inferior anterior view of the digestive system relative to the skeleton. The surface anatomy of t

Imagen libre de derechos A lighting cigarette.

Imagen libre de derechos A posterior view of the deep back muscles relative to the skeleton. The erector spinae and the ilioc

Imagen libre de derechos Test tube containing a blue liquid and a 20 euro note.