Comparative and scaling aspects of heart and body weights with reference to blood supply of cardiac fibers

Relationship between capillaries, mitochondria and maximum power of the heart: a meta-study from shrew to elephant

“…Our exponent of –0.04 ± 0.01 relating cardiac mitochondrial volume density to body mass is identical to that obtained (–0.04) from an earlier assessment of the hearts of 11 species of mammal [10]. Likewise, our exponent of –0.07 ± 0.03 for cardiac capillary numerical density is very similar to that calculated (–0.06) by extracting and analysing data from a study on the hearts of nine species of mammal [11]. That our capillary and mitochondrial density exponents are similar indicates parallel scaling of these two traits as a function of body mass across almost the full range for terrestrial mammals (figure 2).…”

Relationship between capillaries, mitochondria and maximum power of the heart: a meta-study from shrew to elephant

“…Our exponent of –0.04 ± 0.01 relating cardiac mitochondrial volume density to body mass is identical to that obtained (–0.04) from an earlier assessment of the hearts of 11 species of mammal [10]. Likewise, our exponent of –0.07 ± 0.03 for cardiac capillary numerical density is very similar to that calculated (–0.06) by extracting and analysing data from a study on the hearts of nine species of mammal [11]. That our capillary and mitochondrial density exponents are similar indicates parallel scaling of these two traits as a function of body mass across almost the full range for terrestrial mammals (figure 2).…”

The intrinsic properties of an in situ perfused crocodile heart

“…The heart mass relative to body mass of C. porosus was 3.05 g kg Ϫ1 body mass This is similar to the relative heart masses recorded for snakes (3.1 g kg Ϫ1 ; Poupa and Lindstrom, 1983) and the lizard Amphibolurus vitticeps (2.85 g kg Ϫ1 ; Else and Hulbert, 1983), but considerably greater than the heart mass of the tortoise Emydura signata (1.6 g kg Ϫ1 ; C. E. Franklin, unpublished observations). Among the fishes, the relative ventricle mass is greater in the more active species, such as yellowfin and skipjack tuna, than in sluggish fish, such as the sea raven (Farrell, 1991).…”

Structure and function of the hearts of lizards and snakes

“…Accordingly, the cavum arteriosum and cavum venosum functions as a high‐pressure chamber and constitutes roughly 75% of the ventricular mass (Jensen et al , 2010 c ). Remarkably, relative ventricular mass (approximately 0.15%), is similar to if not lower than in other snakes (Poupa & Lindström, ; Seymour, ; Lillywhite & Smits, : Jensen et al , 2010 c ). If workload is reflected in heart weight, pressure separation is seemingly an inexpensive adaptation in pythons.…”

Relationship between capillaries, mitochondria and maximum power of the heart: a meta-study from shrew to elephant

“…Our exponent of –0.04 ± 0.01 relating cardiac mitochondrial volume density to body mass is identical to that obtained (–0.04) from an earlier assessment of the hearts of 11 species of mammal [10]. Likewise, our exponent of –0.07 ± 0.03 for cardiac capillary numerical density is very similar to that calculated (–0.06) by extracting and analysing data from a study on the hearts of nine species of mammal [11]. That our capillary and mitochondrial density exponents are similar indicates parallel scaling of these two traits as a function of body mass across almost the full range for terrestrial mammals (figure 2).…”

The intrinsic properties of an in situ perfused crocodile heart

“…The heart mass relative to body mass of C. porosus was 3.05 g kg Ϫ1 body mass This is similar to the relative heart masses recorded for snakes (3.1 g kg Ϫ1 ; Poupa and Lindstrom, 1983) and the lizard Amphibolurus vitticeps (2.85 g kg Ϫ1 ; Else and Hulbert, 1983), but considerably greater than the heart mass of the tortoise Emydura signata (1.6 g kg Ϫ1 ; C. E. Franklin, unpublished observations). Among the fishes, the relative ventricle mass is greater in the more active species, such as yellowfin and skipjack tuna, than in sluggish fish, such as the sea raven (Farrell, 1991).…”

Structure and function of the hearts of lizards and snakes

“…Accordingly, the cavum arteriosum and cavum venosum functions as a high‐pressure chamber and constitutes roughly 75% of the ventricular mass (Jensen et al , 2010 c ). Remarkably, relative ventricular mass (approximately 0.15%), is similar to if not lower than in other snakes (Poupa & Lindström, ; Seymour, ; Lillywhite & Smits, : Jensen et al , 2010 c ). If workload is reflected in heart weight, pressure separation is seemingly an inexpensive adaptation in pythons.…”

Relationship between capillaries, mitochondria and maximum power of the heart: a meta-study from shrew to elephant

“…Our exponent of –0.04 ± 0.01 relating cardiac mitochondrial volume density to body mass is identical to that obtained (–0.04) from an earlier assessment of the hearts of 11 species of mammal [10]. Likewise, our exponent of –0.07 ± 0.03 for cardiac capillary numerical density is very similar to that calculated (–0.06) by extracting and analysing data from a study on the hearts of nine species of mammal [11]. That our capillary and mitochondrial density exponents are similar indicates parallel scaling of these two traits as a function of body mass across almost the full range for terrestrial mammals (figure 2).…”

The intrinsic properties of an in situ perfused crocodile heart

“…The heart mass relative to body mass of C. porosus was 3.05 g kg Ϫ1 body mass This is similar to the relative heart masses recorded for snakes (3.1 g kg Ϫ1 ; Poupa and Lindstrom, 1983) and the lizard Amphibolurus vitticeps (2.85 g kg Ϫ1 ; Else and Hulbert, 1983), but considerably greater than the heart mass of the tortoise Emydura signata (1.6 g kg Ϫ1 ; C. E. Franklin, unpublished observations). Among the fishes, the relative ventricle mass is greater in the more active species, such as yellowfin and skipjack tuna, than in sluggish fish, such as the sea raven (Farrell, 1991).…”

Structure and function of the hearts of lizards and snakes

“…Accordingly, the cavum arteriosum and cavum venosum functions as a high‐pressure chamber and constitutes roughly 75% of the ventricular mass (Jensen et al , 2010 c ). Remarkably, relative ventricular mass (approximately 0.15%), is similar to if not lower than in other snakes (Poupa & Lindström, ; Seymour, ; Lillywhite & Smits, : Jensen et al , 2010 c ). If workload is reflected in heart weight, pressure separation is seemingly an inexpensive adaptation in pythons.…”