Molecular biology is a field of biology that looks at the molecular machinery of life. The field was founded in the early 1930s, though the phrase was only used in 1938 and the field didn't take off until the late 50s and early 60s. Since then, progress in the field has been massive.
The Ionosphere and the Exosphere (minor layers) are parts of the Thermosphere (major layer). The ionosphere is part of the theremosphere.
The layer of the digestive tract that contains blood and lymph  vessels and nerve cells is the sub mucosa.The sub mucosa layer is  located underneath the mucosa layer. Edit. Share to: Judy Olmsted. 78,944 Contributions. Taught College level A&P for 27 years. Biology Supervisor.he Dermis contains 2 main layers (plexi) of blood vessels, which can be referred to as the superficial de â¦ rmal plexus and deep dermal plexus. More detail: The dermis can be split up into two layers, the papillary dermis and reticular dermis. One vascular plexus is situated in each.