What two structures occupy the Centre of a medullary ray?

What two structures occupy the Centre of a medullary ray?

Between the interlobular blood vessels and the medullary ray are the renal corpuscles and convoluted tubules, together constituting the cortical labyrinth.

Are medullary rays present in dicot stem?

In a dicot stem, the parenchymal strips which are found between the vascular bundles are known as medullary rays. They are also known as vascular rays or pith rays. The function of medullary rays is as follows, >They separate the primary phloem and xylem.

What is the histology of kidney?

The kidney is organised into many lobes, organised in a pyramidal structure, where the outer portion is made up of cortex, and the inner portion is made up of the medulla. The kidney contains about 1 million functional units called nephrons, which are continuous with a system of collecting tubules.

What do the medullary rays contain?

renal tubules
The medullary rays are well-defined anatomic structures consisting of bundles of renal tubules which form in the renal cortex and continue through the renal medulla as the medullary striations.

What is a medullary ray in the kidney?

In anatomy, the medullary ray (Ferrein’s pyramid) is the middle part of the cortical lobule or renal lobule, consisting of a group of straight tubes connected to the collecting ducts. Their name is potentially misleading — the “medullary” refers to their destination, not their location.

What is the function of medullary rays?

Medullary rays are strips of parenchyma present between vascular bundles of dicot stem. It keeps a bond between pericycle and medulla. The medullary rays are necessary for the radial transmission of the water, minerals and other natural substances. They keep up a living link between the pith and the cortex.

Are medullary rays present in monocot root?

Medullary rays are present only in dicots and not in monocots.

What is the function of medullary ray?

These medullary or pith rays are essential for the radial conduction of the water, minerals and other organic substances. They transport the substances from center to periphery. These rays are also known as vascular rays or pith rays.

What are the 3 layers of kidney?

The kidneys are made up by three external layers, which include the renal fascia (the outermost layer), the perirenal fat capsule, and lastly, the innermost layer, the renal capsule, which then surround the space of the renal cortex.

What histology means?

Listen to pronunciation. (his-TAH-loh-jee) The study of tissues and cells under a microscope.

Do medullary rays have glomeruli?

The cortex is subdivided into alternating regions: 1) the cortical labyrinth consists of glomeruli and convoluted tubules; and 2) the medullary rays consist primarily of radially directed straight segments of the loop of Henle and collecting tubules.

What is medullary rays and its function?

Medullary rays are strips of parenchyma present between vascular bundles of dicot stem. They separate xylem and phloem bundles. They serve as a link between pith and cortex. They are also known as pith rays and vascular rays.

What makes up the medullary ray of the kidney lobule?

A kidney lobule consists of a medullary ray and the portions of the adjacent cortical labyrinth. The medulla is further sub-divided into an outer zone adjacent to the cortex and an inner zone including the tip of the pyramid (which is called the papilla).

Where are the tubules located in the renal system?

The region of cortex between the rays, called the cortical labyrinth (or pars convoluta) in slide 204 View Image, contains renal corpuscles and the convoluted portions of the tubules. 1. Tubules Identify the three general types of tubules that occur in the cortical labyrinth and medullary rays of the cortex:

Where is the medullary ray located in a plant?

Medullary ray (anatomy) For the structure found in woody plant stems and roots, see Medullary ray (botany). In anatomy, the medullary ray ( Ferrein’s pyramid) is the middle part of the cortical lobule or renal lobule, consisting of a group of straight tubes connected to the collecting ducts .

Where are the pars radiata located in the renal system?

Examine the cortex of slide 204. You will recognize medullary rays (or pars radiata) in slide 204 View Image, which are clusters of parallel tubules (sectioned longitudinally) that appear to be coming out from the medulla.