 | 1875 - 694 páginas
...formed, and the rudiment is situated below the fore gut or rudiment of the alimentary canal ; bjr the end of the first half of the second day it is flask-shaped,...muscle or nerve-cells. To provide channels for the Huid pressed out by the contractions of the heart, the heart divides into the two primitive aortae,... | |
 | Sir Michael Foster, Francis Maitland Balfour - 1874 - 304 páginas
...Sub-equently it becomes free in its middle poi tion, the arterial and venous ends alone remaining attached. Soon after its formation the heart begins to beat,...at the venous and passing on to the arterial end. It is of some interest to note that its functional activity commences long before the cells of which... | |
 | 1875 - 692 páginas
...the medullary tube. The heart originates also in the head-fold at about the lime the protoverlebrse are formed, and the rudiment is situated below the...the heart, the heart divides into the two primitive aortte, and connects with other embryonic temporary arteries and veins. Meanwhile in the vascular ares... | |
 | 1875 - 698 páginas
...the medullary tube. The heart originates also in the head-fold at about the time the protovertebrse are formed, and the rudiment is situated below the...the heart, the heart divides into the two primitive aortas, and connects with other embryonic temporary arteries and veins. Meanwhile in the. vascular... | |
 | 1875 - 692 páginas
...the medullary tube. The heart originates also in the head-fold at about the lime the protoverlebrse are formed, and the rudiment is situated below the...the heart, the heart divides into the two primitive aortte, and connects with other embryonic temporary arteries and veins. Meanwhile in the vascular ares... | |
 | Alpheus Spring Packard - 1876 - 252 páginas
...the medullary tube. The heart originates also in the head-fold at about the time the protovertebrse are formed, and the rudiment is situated below the...the heart, the heart divides into the two primitive aortse, and connects with other embryonic temporary arteries and veins. Meanwhile in the vascular area... | |
 | 1884 - 734 páginas
...following from .the same authors is deeply suggestive: "Soon after its formation the heart begins to beat, at first slow and rare pulsations, beginning at the venous and passing on to the arterial end. It is of some interest to note that its functional activity commences long before the cells of which... | |
 | Frank Washington Very - 1927 - 414 páginas
...(The Fiber, n. 124.) Confirmation of a general sort may be derived from modern observation as (eg): "Soon after its formation the heart begins to beat,...at the venous and passing on to the arterial end. It is of some interest to note that its functional activity commences long before the cells of which... | |
 | 1884 - 738 páginas
...following from the same authors is deeply suggestive: "Soon after its formation the heart begins to beat, at first slow and rare pulsations, beginning at the venous and passing on to the arterial end. It is of some interest to note that its functional activity commences long before the cells of which... | |
| |
The heart originates also in the head-fold at about the time the protovertebrse are formed, and the rudiment is situated below the fore gut or rudiment of the alimentary canal ; by the end of the first half of the second day it is flask-shaped, with a... 