Viewed microscopically, the wall of the peridium is made of a single layer of tissue, in contrast to the three-layered peridium wall in Cyathus species.
This external skeleton underlies a continuous, superficial layer of tissue.
He closed up the wound by sewing sutures into the fibrous layer of tissue beneath the skin.
Lepidophloios wrapped its megasporangium in a layer of tissue much like that of the seed plants.
A thin layer of tissue, the pericardium, covers the outside, and another layer, the endocardium, lines the inside.
The retina is a layer of tissue at the back of the eye that collects light relayed through the lens.
Among species with no female duct, sperm are injected, and fertilization occurs in the inner layer of tissue.
In the early nineteen-seventies, biologists who were scanning baboon placentas with an electron microscope were surprised to see retroviruses on a layer of tissue known as the syncytium, which forms the principal barrier between mother and fetus.
The human brain is immediately recognizable by its cortex (meaning bark in Latin), the prominent outer layer of tissue, with its characteristic pattern of ridges and furrows, which sits atop the deep structures.
Whereas the developing gonads of all other vertebrates have an outer and inner layer of tissue, those of bony fishes have a simple origin that lacks any male or female elements.
A weak layer of tissue called the abscission layer develops at the base of each leaf stalk, and at this point the stalk breaks and the leaf is shed.
